diff --git a/packages/markitdown/src/markitdown/_base_converter.py b/packages/markitdown/src/markitdown/_base_converter.py
index 5919295..89506b1 100644
--- a/packages/markitdown/src/markitdown/_base_converter.py
+++ b/packages/markitdown/src/markitdown/_base_converter.py
@@ -41,7 +41,7 @@ class DocumentConverterResult:
         self.markdown = markdown
 
     def __str__(self) -> str:
-        """Return the Markdown content."""
+        """Return the converted Markdown text."""
         return self.markdown
 
 
diff --git a/packages/markitdown/src/markitdown/_markitdown.py b/packages/markitdown/src/markitdown/_markitdown.py
index db5d378..f1d0c1f 100644
--- a/packages/markitdown/src/markitdown/_markitdown.py
+++ b/packages/markitdown/src/markitdown/_markitdown.py
@@ -130,7 +130,7 @@ class MarkItDown:
             # Later registrations are tried first / take higher priority than earlier registrations
             # To this end, the most specific converters should appear below the most generic converters
             self.register_converter(PlainTextConverter())
-            self.register_converter(ZipConverter())
+            self.register_converter(ZipConverter(markitdown=self))
             self.register_converter(HtmlConverter())
             self.register_converter(RssConverter())
             self.register_converter(WikipediaConverter())
@@ -464,16 +464,16 @@ class MarkItDown:
 
                 # Attempt the conversion
                 if _accepts:
-                    # try:
-                    res = converter.convert(file_stream, stream_info, **_kwargs)
-                    # except Exception:
-                    #    failed_attempts.append(
-                    #        FailedConversionAttempt(
-                    #            converter=converter, exc_info=sys.exc_info()
-                    #        )
-                    #    )
-                    # finally:
-                    file_stream.seek(cur_pos)
+                    try:
+                        res = converter.convert(file_stream, stream_info, **_kwargs)
+                    except Exception:
+                        failed_attempts.append(
+                            FailedConversionAttempt(
+                                converter=converter, exc_info=sys.exc_info()
+                            )
+                        )
+                    finally:
+                        file_stream.seek(cur_pos)
 
                 if res is not None:
                     # Normalize the content
diff --git a/packages/markitdown/src/markitdown/_stream_info.py b/packages/markitdown/src/markitdown/_stream_info.py
index 7a30dcc..cf36875 100644
--- a/packages/markitdown/src/markitdown/_stream_info.py
+++ b/packages/markitdown/src/markitdown/_stream_info.py
@@ -1,4 +1,6 @@
 import puremagic
+import mimetypes
+import os
 from dataclasses import dataclass, asdict
 from typing import Optional, BinaryIO, List, TypeVar, Type
 
@@ -56,6 +58,18 @@ class StreamInfo:
         """
         guesses: List[StreamInfo] = []
 
+        # Add a guess purely based on the filename hint
+        if filename_hint:
+            try:
+                mimetype, _ = mimetypes.guess_file_type(filename_hint)
+            except AttributeError:
+                mimetype, _ = mimetypes.guess_type(filename_hint)
+
+            if mimetype:
+                guesses.append(
+                    cls(mimetype=mimetype, extension=os.path.splitext(filename_hint)[1])
+                )
+
         def _puremagic(
             file_stream, filename_hint
         ) -> puremagic.main.PureMagicWithConfidence:
diff --git a/packages/markitdown/src/markitdown/converters/_bing_serp_converter.py b/packages/markitdown/src/markitdown/converters/_bing_serp_converter.py
index 2adcdb9..2e9913c 100644
--- a/packages/markitdown/src/markitdown/converters/_bing_serp_converter.py
+++ b/packages/markitdown/src/markitdown/converters/_bing_serp_converter.py
@@ -41,7 +41,7 @@ class BingSerpConverter(DocumentConverter):
         Make sure we're dealing with HTML content *from* Bing.
         """
 
-        url = (stream_info.url or "").lower()
+        url = stream_info.url or ""
         mimetype = (stream_info.mimetype or "").lower()
         extension = (stream_info.extension or "").lower()
 
diff --git a/packages/markitdown/src/markitdown/converters/_image_converter.py b/packages/markitdown/src/markitdown/converters/_image_converter.py
index c51124f..d0d7e66 100644
--- a/packages/markitdown/src/markitdown/converters/_image_converter.py
+++ b/packages/markitdown/src/markitdown/converters/_image_converter.py
@@ -1,4 +1,4 @@
-from typing import BinaryIO, Any
+from typing import BinaryIO, Any, Union
 import base64
 import mimetypes
 from ._exiftool import exiftool_metadata
@@ -71,53 +71,73 @@ class ImageConverter(DocumentConverter):
                 if f in metadata:
                     md_content += f"{f}: {metadata[f]}\n"
 
-        #        # Try describing the image with GPTV
-        #        llm_client = kwargs.get("llm_client")
-        #        llm_model = kwargs.get("llm_model")
-        #        if llm_client is not None and llm_model is not None:
-        #            md_content += (
-        #                "\n# Description:\n"
-        #                + self._get_llm_description(
-        #                    local_path,
-        #                    extension,
-        #                    llm_client,
-        #                    llm_model,
-        #                    prompt=kwargs.get("llm_prompt"),
-        #                ).strip()
-        #                + "\n"
-        #            )
+        # Try describing the image with GPT
+        llm_client = kwargs.get("llm_client")
+        llm_model = kwargs.get("llm_model")
+        if llm_client is not None and llm_model is not None:
+            md_content += (
+                "\n# Description:\n"
+                + self._get_llm_description(
+                    file_stream,
+                    stream_info,
+                    client=llm_client,
+                    model=llm_model,
+                    prompt=kwargs.get("llm_prompt"),
+                ).strip()
+                + "\n"
+            )
 
         return DocumentConverterResult(
             markdown=md_content,
         )
 
+    def _get_llm_description(
+        self,
+        file_stream: BinaryIO,
+        stream_info: StreamInfo,
+        *,
+        client,
+        model,
+        prompt=None,
+    ) -> Union[None, str]:
+        if prompt is None or prompt.strip() == "":
+            prompt = "Write a detailed caption for this image."
 
-#    def _get_llm_description(self, local_path, extension, client, model, prompt=None):
-#        if prompt is None or prompt.strip() == "":
-#            prompt = "Write a detailed caption for this image."
-#
-#        data_uri = ""
-#        with open(local_path, "rb") as image_file:
-#            content_type, encoding = mimetypes.guess_type("_dummy" + extension)
-#            if content_type is None:
-#                content_type = "image/jpeg"
-#            image_base64 = base64.b64encode(image_file.read()).decode("utf-8")
-#            data_uri = f"data:{content_type};base64,{image_base64}"
-#
-#        messages = [
-#            {
-#                "role": "user",
-#                "content": [
-#                    {"type": "text", "text": prompt},
-#                    {
-#                        "type": "image_url",
-#                        "image_url": {
-#                            "url": data_uri,
-#                        },
-#                    },
-#                ],
-#            }
-#        ]
-#
-#        response = client.chat.completions.create(model=model, messages=messages)
-#        return response.choices[0].message.content
+        # Get the content type
+        content_type = stream_info.mimetype
+        if not content_type:
+            content_type, _ = mimetypes.guess_type("_dummy" + stream_info.extension)
+        if not content_type:
+            content_type = "application/octet-stream"
+
+        # Convert to base64
+        cur_pos = file_stream.tell()
+        try:
+            base64_image = base64.b64encode(file_stream.read()).decode("utf-8")
+        except Exception as e:
+            return None
+        finally:
+            file_stream.seek(cur_pos)
+
+        # Prepare the data-uri
+        data_uri = f"data:{content_type};base64,{base64_image}"
+
+        # Prepare the OpenAI API request
+        messages = [
+            {
+                "role": "user",
+                "content": [
+                    {"type": "text", "text": prompt},
+                    {
+                        "type": "image_url",
+                        "image_url": {
+                            "url": data_uri,
+                        },
+                    },
+                ],
+            }
+        ]
+
+        # Call the OpenAI API
+        response = client.chat.completions.create(model=model, messages=messages)
+        return response.choices[0].message.content
diff --git a/packages/markitdown/src/markitdown/converters/_llm_caption.py b/packages/markitdown/src/markitdown/converters/_llm_caption.py
new file mode 100644
index 0000000..44756e0
--- /dev/null
+++ b/packages/markitdown/src/markitdown/converters/_llm_caption.py
@@ -0,0 +1,50 @@
+from typing import BinaryIO, Any, Union
+import base64
+import mimetypes
+from .._stream_info import StreamInfo
+
+
+def llm_caption(
+    file_stream: BinaryIO, stream_info: StreamInfo, *, client, model, prompt=None
+) -> Union[None, str]:
+    if prompt is None or prompt.strip() == "":
+        prompt = "Write a detailed caption for this image."
+
+    # Get the content type
+    content_type = stream_info.mimetype
+    if not content_type:
+        content_type, _ = mimetypes.guess_type("_dummy" + stream_info.extension)
+    if not content_type:
+        content_type = "application/octet-stream"
+
+    # Convert to base64
+    cur_pos = file_stream.tell()
+    try:
+        base64_image = base64.b64encode(file_stream.read()).decode("utf-8")
+    except Exception as e:
+        return None
+    finally:
+        file_stream.seek(cur_pos)
+
+    # Prepare the data-uri
+    data_uri = f"data:{content_type};base64,{base64_image}"
+
+    # Prepare the OpenAI API request
+    messages = [
+        {
+            "role": "user",
+            "content": [
+                {"type": "text", "text": prompt},
+                {
+                    "type": "image_url",
+                    "image_url": {
+                        "url": data_uri,
+                    },
+                },
+            ],
+        }
+    ]
+
+    # Call the OpenAI API
+    response = client.chat.completions.create(model=model, messages=messages)
+    return response.choices[0].message.content
diff --git a/packages/markitdown/src/markitdown/converters/_pdf_converter.py b/packages/markitdown/src/markitdown/converters/_pdf_converter.py
index 00228b5..48fc499 100644
--- a/packages/markitdown/src/markitdown/converters/_pdf_converter.py
+++ b/packages/markitdown/src/markitdown/converters/_pdf_converter.py
@@ -1,8 +1,13 @@
 import sys
-from typing import Union
+
+from typing import BinaryIO, Any
+
+from ._html_converter import HtmlConverter
 from .._base_converter import DocumentConverter, DocumentConverterResult
+from .._stream_info import StreamInfo
 from .._exceptions import MissingDependencyException, MISSING_DEPENDENCY_MESSAGE
 
+
 # Try loading optional (but in this case, required) dependencies
 # Save reporting of any exceptions for later
 _dependency_exc_info = None
@@ -14,6 +19,14 @@ except ImportError:
     _dependency_exc_info = sys.exc_info()
 
 
+ACCEPTED_MIME_TYPE_PREFIXES = [
+    "application/pdf",
+    "application/x-pdf",
+]
+
+ACCEPTED_FILE_EXTENSIONS = [".pdf"]
+
+
 class PdfConverter(DocumentConverter):
     """
     Converts PDFs to Markdown. Most style information is ignored, so the results are essentially plain-text.
@@ -24,12 +37,30 @@ class PdfConverter(DocumentConverter):
     ):
         super().__init__(priority=priority)
 
-    def convert(self, local_path, **kwargs) -> Union[None, DocumentConverterResult]:
-        # Bail if not a PDF
-        extension = kwargs.get("file_extension", "")
-        if extension.lower() != ".pdf":
-            return None
+    def accepts(
+        self,
+        file_stream: BinaryIO,
+        stream_info: StreamInfo,
+        **kwargs: Any,  # Options to pass to the converter
+    ) -> bool:
+        mimetype = (stream_info.mimetype or "").lower()
+        extension = (stream_info.extension or "").lower()
 
+        if extension in ACCEPTED_FILE_EXTENSIONS:
+            return True
+
+        for prefix in ACCEPTED_MIME_TYPE_PREFIXES:
+            if mimetype.startswith(prefix):
+                return True
+
+        return False
+
+    def convert(
+        self,
+        file_stream: BinaryIO,
+        stream_info: StreamInfo,
+        **kwargs: Any,  # Options to pass to the converter
+    ) -> DocumentConverterResult:
         # Check the dependencies
         if _dependency_exc_info is not None:
             raise MissingDependencyException(
@@ -43,5 +74,5 @@ class PdfConverter(DocumentConverter):
             )  # Restore the original traceback
 
         return DocumentConverterResult(
-            markdown=pdfminer.high_level.extract_text(local_path)
+            markdown=pdfminer.high_level.extract_text(file_stream),
         )
diff --git a/packages/markitdown/src/markitdown/converters/_plain_text_converter.py b/packages/markitdown/src/markitdown/converters/_plain_text_converter.py
index a9f1902..92da511 100644
--- a/packages/markitdown/src/markitdown/converters/_plain_text_converter.py
+++ b/packages/markitdown/src/markitdown/converters/_plain_text_converter.py
@@ -1,13 +1,26 @@
-import mimetypes
-
-from charset_normalizer import from_path
-from typing import Any, Union
+import sys
 
+from typing import BinaryIO, Any
+from charset_normalizer import from_bytes
 from .._base_converter import DocumentConverter, DocumentConverterResult
+from .._stream_info import StreamInfo
 
+# Try loading optional (but in this case, required) dependencies
+# Save reporting of any exceptions for later
+_dependency_exc_info = None
+try:
+    import mammoth
+except ImportError:
+    # Preserve the error and stack trace for later
+    _dependency_exc_info = sys.exc_info()
+
+ACCEPTED_MIME_TYPE_PREFIXES = [
+    "text/",
+    "application/json",
+]
 
 # Mimetypes to ignore (commonly confused extensions)
-IGNORE_MIMETYPES = [
+IGNORE_MIME_TYPE_PREFIXES = [
     "text/vnd.in3d.spot",  # .spo wich is confused with xls, doc, etc.
     "text/vnd.graphviz",  # .dot which is confused with xls, doc, etc.
 ]
@@ -21,26 +34,34 @@ class PlainTextConverter(DocumentConverter):
     ):
         super().__init__(priority=priority)
 
+    def accepts(
+        self,
+        file_stream: BinaryIO,
+        stream_info: StreamInfo,
+        **kwargs: Any,  # Options to pass to the converter
+    ) -> bool:
+        mimetype = (stream_info.mimetype or "").lower()
+        extension = (stream_info.extension or "").lower()
+
+        for prefix in IGNORE_MIME_TYPE_PREFIXES:
+            if mimetype.startswith(prefix):
+                return False
+
+        for prefix in ACCEPTED_MIME_TYPE_PREFIXES:
+            if mimetype.startswith(prefix):
+                return True
+
+        return False
+
     def convert(
-        self, local_path: str, **kwargs: Any
-    ) -> Union[None, DocumentConverterResult]:
-        # Guess the content type from any file extension that might be around
-        content_type, _ = mimetypes.guess_type(
-            "__placeholder" + kwargs.get("file_extension", "")
-        )
+        self,
+        file_stream: BinaryIO,
+        stream_info: StreamInfo,
+        **kwargs: Any,  # Options to pass to the converter
+    ) -> DocumentConverterResult:
+        if stream_info.charset:
+            text_content = file_stream.read().decode(stream_info.charset)
+        else:
+            text_content = str(from_bytes(file_stream.read()).best())
 
-        # Ignore common false positives
-        if content_type in IGNORE_MIMETYPES:
-            content_type = None
-
-        # Only accept text files
-        if content_type is None:
-            return None
-        elif all(
-            not content_type.lower().startswith(type_prefix)
-            for type_prefix in ["text/", "application/json"]
-        ):
-            return None
-
-        text_content = str(from_path(local_path).best())
         return DocumentConverterResult(markdown=text_content)
diff --git a/packages/markitdown/src/markitdown/converters/_pptx_converter.py b/packages/markitdown/src/markitdown/converters/_pptx_converter.py
index e250848..2cbd158 100644
--- a/packages/markitdown/src/markitdown/converters/_pptx_converter.py
+++ b/packages/markitdown/src/markitdown/converters/_pptx_converter.py
@@ -1,11 +1,14 @@
 import sys
 import base64
+import os
+import io
 import re
 import html
 
 from typing import BinaryIO, Any
 
 from ._html_converter import HtmlConverter
+from ._llm_caption import llm_caption
 from .._base_converter import DocumentConverter, DocumentConverterResult
 from .._stream_info import StreamInfo
 from .._exceptions import MissingDependencyException, MISSING_DEPENDENCY_MESSAGE
@@ -38,35 +41,6 @@ class PptxConverter(DocumentConverter):
         super().__init__(priority=priority)
         self._html_converter = HtmlConverter()
 
-    def _get_llm_description(
-        self, llm_client, llm_model, image_blob, content_type, prompt=None
-    ):
-        if prompt is None or prompt.strip() == "":
-            prompt = "Write a detailed alt text for this image with less than 50 words."
-
-        image_base64 = base64.b64encode(image_blob).decode("utf-8")
-        data_uri = f"data:{content_type};base64,{image_base64}"
-
-        messages = [
-            {
-                "role": "user",
-                "content": [
-                    {
-                        "type": "image_url",
-                        "image_url": {
-                            "url": data_uri,
-                        },
-                    },
-                    {"type": "text", "text": prompt},
-                ],
-            }
-        ]
-
-        response = llm_client.chat.completions.create(
-            model=llm_model, messages=messages
-        )
-        return response.choices[0].message.content
-
     def accepts(
         self,
         file_stream: BinaryIO,
@@ -120,41 +94,54 @@ class PptxConverter(DocumentConverter):
                 if self._is_picture(shape):
                     # https://github.com/scanny/python-pptx/pull/512#issuecomment-1713100069
 
-                    llm_description = None
-                    alt_text = None
+                    llm_description = ""
+                    alt_text = ""
 
+                    # Potentially generate a description using an LLM
                     llm_client = kwargs.get("llm_client")
                     llm_model = kwargs.get("llm_model")
                     if llm_client is not None and llm_model is not None:
+                        # Prepare a file_stream and stream_info for the image data
+                        image_filename = shape.image.filename
+                        image_extension = None
+                        if image_filename:
+                            image_extension = os.path.splitext(image_filename)[1]
+                        image_stream_info = StreamInfo(
+                            mimetype=shape.image.content_type,
+                            extension=image_extension,
+                            filename=image_filename,
+                        )
+
+                        image_stream = io.BytesIO(shape.image.blob)
+
+                        # Caption the image
                         try:
-                            llm_description = self._get_llm_description(
-                                llm_client,
-                                llm_model,
-                                shape.image.blob,
-                                shape.image.content_type,
+                            llm_description = llm_caption(
+                                image_stream,
+                                image_stream_info,
+                                client=llm_client,
+                                model=llm_model,
+                                prompt=kwargs.get("llm_prompt"),
                             )
                         except Exception:
-                            # Unable to describe with LLM
+                            # Unable to generate a description
                             pass
 
-                    if not llm_description:
-                        try:
-                            alt_text = shape._element._nvXxPr.cNvPr.attrib.get(
-                                "descr", ""
-                            )
-                        except Exception:
-                            # Unable to get alt text
-                            pass
+                    # Also grab any description embedded in the deck
+                    try:
+                        alt_text = shape._element._nvXxPr.cNvPr.attrib.get("descr", "")
+                    except Exception:
+                        # Unable to get alt text
+                        pass
+
+                    # Prepare the alt, escaping any special characters
+                    alt_text = "\n".join([llm_description, alt_text]) or shape.name
+                    alt_text = re.sub(r"[\r\n\[\]]", " ", alt_text)
+                    alt_text = re.sub(r"\s+", " ", alt_text).strip()
 
                     # A placeholder name
                     filename = re.sub(r"\W", "", shape.name) + ".jpg"
-                    md_content += (
-                        "\n!["
-                        + (llm_description or alt_text or shape.name)
-                        + "]("
-                        + filename
-                        + ")\n"
-                    )
+                    md_content += "\n![" + alt_text + "](" + filename + ")\n"
 
                 # Tables
                 if self._is_table(shape):
diff --git a/packages/markitdown/src/markitdown/converters/_wikipedia_converter.py b/packages/markitdown/src/markitdown/converters/_wikipedia_converter.py
index 0eedaec..c9176f6 100644
--- a/packages/markitdown/src/markitdown/converters/_wikipedia_converter.py
+++ b/packages/markitdown/src/markitdown/converters/_wikipedia_converter.py
@@ -36,7 +36,7 @@ class WikipediaConverter(DocumentConverter):
         Make sure we're dealing with HTML content *from* Wikipedia.
         """
 
-        url = (stream_info.url or "").lower()
+        url = stream_info.url or ""
         mimetype = (stream_info.mimetype or "").lower()
         extension = (stream_info.extension or "").lower()
 
diff --git a/packages/markitdown/src/markitdown/converters/_youtube_converter.py b/packages/markitdown/src/markitdown/converters/_youtube_converter.py
index 975d668..2efc6ea 100644
--- a/packages/markitdown/src/markitdown/converters/_youtube_converter.py
+++ b/packages/markitdown/src/markitdown/converters/_youtube_converter.py
@@ -1,14 +1,15 @@
-import re
+import sys
 import json
-import urllib.parse
 import time
-
-from typing import Any, Union, Dict, List
-from urllib.parse import parse_qs, urlparse
+import io
+import re
+from typing import Any, BinaryIO, Optional, Dict, List, Union
+from urllib.parse import parse_qs, urlparse, unquote
 from bs4 import BeautifulSoup
 
 from .._base_converter import DocumentConverter, DocumentConverterResult
-
+from .._stream_info import StreamInfo
+from ._markdownify import _CustomMarkdownify
 
 # Optional YouTube transcription support
 try:
@@ -19,6 +20,17 @@ except ModuleNotFoundError:
     IS_YOUTUBE_TRANSCRIPT_CAPABLE = False
 
 
+ACCEPTED_MIME_TYPE_PREFIXES = [
+    "text/html",
+    "application/xhtml",
+]
+
+ACCEPTED_FILE_EXTENSIONS = [
+    ".html",
+    ".htm",
+]
+
+
 class YouTubeConverter(DocumentConverter):
     """Handle YouTube specially, focusing on the video title, description, and transcript."""
 
@@ -27,45 +39,45 @@ class YouTubeConverter(DocumentConverter):
     ):
         super().__init__(priority=priority)
 
-    def retry_operation(self, operation, retries=3, delay=2):
-        """Retries the operation if it fails."""
-        attempt = 0
-        while attempt < retries:
-            try:
-                return operation()  # Attempt the operation
-            except Exception as e:
-                print(f"Attempt {attempt + 1} failed: {e}")
-                if attempt < retries - 1:
-                    time.sleep(delay)  # Wait before retrying
-                attempt += 1
-        # If all attempts fail, raise the last exception
-        raise Exception(f"Operation failed after {retries} attempts.")
+    def accepts(
+        self,
+        file_stream: BinaryIO,
+        stream_info: StreamInfo,
+        **kwargs: Any,  # Options to pass to the converter
+    ) -> bool:
+        """
+        Make sure we're dealing with HTML content *from* YouTube.
+        """
+        url = stream_info.url or ""
+        mimetype = (stream_info.mimetype or "").lower()
+        extension = (stream_info.extension or "").lower()
 
-    def convert(
-        self, local_path: str, **kwargs: Any
-    ) -> Union[None, DocumentConverterResult]:
-        # Bail if not YouTube
-        extension = kwargs.get("file_extension", "")
-        if extension.lower() not in [".html", ".htm"]:
-            return None
-        url = kwargs.get("url", "")
-
-        url = urllib.parse.unquote(url)
+        url = unquote(url)
         url = url.replace(r"\?", "?").replace(r"\=", "=")
 
         if not url.startswith("https://www.youtube.com/watch?"):
-            return None
+            # Not a YouTube URL
+            return False
 
-        # Parse the file with error handling
-        try:
-            with open(local_path, "rt", encoding="utf-8") as fh:
-                soup = BeautifulSoup(fh.read(), "html.parser")
-        except Exception as e:
-            print(f"Error reading YouTube page: {e}")
-            return None
+        if extension in ACCEPTED_FILE_EXTENSIONS:
+            return True
 
-        if not soup.title or not soup.title.string:
-            return None
+        for prefix in ACCEPTED_MIME_TYPE_PREFIXES:
+            if mimetype.startswith(prefix):
+                return True
+
+        # Not HTML content
+        return False
+
+    def convert(
+        self,
+        file_stream: BinaryIO,
+        stream_info: StreamInfo,
+        **kwargs: Any,  # Options to pass to the converter
+    ) -> DocumentConverterResult:
+        # Parse the stream
+        encoding = "utf-8" if stream_info.charset is None else stream_info.charset
+        soup = BeautifulSoup(file_stream, "html.parser", from_encoding=encoding)
 
         # Read the meta tags
         metadata: Dict[str, str] = {"title": soup.title.string}
@@ -126,7 +138,7 @@ class YouTubeConverter(DocumentConverter):
 
         if IS_YOUTUBE_TRANSCRIPT_CAPABLE:
             transcript_text = ""
-            parsed_url = urlparse(url)  # type: ignore
+            parsed_url = urlparse(stream_info.url)  # type: ignore
             params = parse_qs(parsed_url.query)  # type: ignore
             if "v" in params and params["v"][0]:
                 video_id = str(params["v"][0])
@@ -135,7 +147,7 @@ class YouTubeConverter(DocumentConverter):
                         "youtube_transcript_languages", ("en",)
                     )
                     # Retry the transcript fetching operation
-                    transcript = self.retry_operation(
+                    transcript = self._retry_operation(
                         lambda: YouTubeTranscriptApi.get_transcript(
                             video_id, languages=youtube_transcript_languages
                         ),
@@ -188,3 +200,17 @@ class YouTubeConverter(DocumentConverter):
                 if result := self._findKey(v, key):
                     return result
         return None
+
+    def _retry_operation(self, operation, retries=3, delay=2):
+        """Retries the operation if it fails."""
+        attempt = 0
+        while attempt < retries:
+            try:
+                return operation()  # Attempt the operation
+            except Exception as e:
+                print(f"Attempt {attempt + 1} failed: {e}")
+                if attempt < retries - 1:
+                    time.sleep(delay)  # Wait before retrying
+                attempt += 1
+        # If all attempts fail, raise the last exception
+        raise Exception(f"Operation failed after {retries} attempts.")
diff --git a/packages/markitdown/src/markitdown/converters/_zip_converter.py b/packages/markitdown/src/markitdown/converters/_zip_converter.py
index 7c8c6db..3717fb2 100644
--- a/packages/markitdown/src/markitdown/converters/_zip_converter.py
+++ b/packages/markitdown/src/markitdown/converters/_zip_converter.py
@@ -1,9 +1,19 @@
-import os
+import sys
 import zipfile
-import shutil
-from typing import Any, Union
+import io
+import os
+
+from typing import BinaryIO, Any
 
 from .._base_converter import DocumentConverter, DocumentConverterResult
+from .._stream_info import StreamInfo
+from .._exceptions import UnsupportedFormatException, FileConversionException
+
+ACCEPTED_MIME_TYPE_PREFIXES = [
+    "application/zip",
+]
+
+ACCEPTED_FILE_EXTENSIONS = [".zip"]
 
 
 class ZipConverter(DocumentConverter):
@@ -46,95 +56,59 @@ class ZipConverter(DocumentConverter):
     """
 
     def __init__(
-        self, priority: float = DocumentConverter.PRIORITY_SPECIFIC_FILE_FORMAT
+        self,
+        priority: float = DocumentConverter.PRIORITY_SPECIFIC_FILE_FORMAT,
+        *,
+        markitdown: Any,
     ):
         super().__init__(priority=priority)
+        self._markitdown = markitdown
+
+    def accepts(
+        self,
+        file_stream: BinaryIO,
+        stream_info: StreamInfo,
+        **kwargs: Any,  # Options to pass to the converter
+    ) -> bool:
+        mimetype = (stream_info.mimetype or "").lower()
+        extension = (stream_info.extension or "").lower()
+
+        if extension in ACCEPTED_FILE_EXTENSIONS:
+            return True
+
+        for prefix in ACCEPTED_MIME_TYPE_PREFIXES:
+            if mimetype.startswith(prefix):
+                return True
+
+        return False
 
     def convert(
-        self, local_path: str, **kwargs: Any
-    ) -> Union[None, DocumentConverterResult]:
-        # Bail if not a ZIP
-        extension = kwargs.get("file_extension", "")
-        if extension.lower() != ".zip":
-            return None
+        self,
+        file_stream: BinaryIO,
+        stream_info: StreamInfo,
+        **kwargs: Any,  # Options to pass to the converter
+    ) -> DocumentConverterResult:
+        file_path = stream_info.url or stream_info.local_path or stream_info.file_name
+        md_content = f"Content from the zip file `{file_path}`:\n\n"
 
-        # Get parent converters list if available
-        parent_converters = kwargs.get("_parent_converters", [])
-        if not parent_converters:
-            return DocumentConverterResult(
-                markdown=f"[ERROR] No converters available to process zip contents from: {local_path}",
-            )
+        with zipfile.ZipFile(file_stream, "r") as zipObj:
+            for name in zipObj.namelist():
+                try:
+                    z_file_stream = io.BytesIO(zipObj.read(name))
+                    z_file_stream_info = StreamInfo(
+                        extension=os.path.splitext(name)[1],
+                        filename=os.path.basename(name),
+                    )
+                    result = self._markitdown.convert_stream(
+                        stream=z_file_stream,
+                        stream_info=z_file_stream_info,
+                    )
+                    if result is not None:
+                        md_content += f"## File: {name}\n\n"
+                        md_content += result.markdown + "\n\n"
+                except UnsupportedFormatException:
+                    pass
+                except FileConversionException:
+                    pass
 
-        extracted_zip_folder_name = (
-            f"extracted_{os.path.basename(local_path).replace('.zip', '_zip')}"
-        )
-        extraction_dir = os.path.normpath(
-            os.path.join(os.path.dirname(local_path), extracted_zip_folder_name)
-        )
-        md_content = f"Content from the zip file `{os.path.basename(local_path)}`:\n\n"
-
-        try:
-            # Extract the zip file safely
-            with zipfile.ZipFile(local_path, "r") as zipObj:
-                # Bail if we discover it's an Office OOXML file
-                if "[Content_Types].xml" in zipObj.namelist():
-                    return None
-
-                # Safeguard against path traversal
-                for member in zipObj.namelist():
-                    member_path = os.path.normpath(os.path.join(extraction_dir, member))
-                    if (
-                        not os.path.commonprefix([extraction_dir, member_path])
-                        == extraction_dir
-                    ):
-                        raise ValueError(
-                            f"Path traversal detected in zip file: {member}"
-                        )
-
-                # Extract all files safely
-                zipObj.extractall(path=extraction_dir)
-
-            # Process each extracted file
-            for root, dirs, files in os.walk(extraction_dir):
-                for name in files:
-                    file_path = os.path.join(root, name)
-                    relative_path = os.path.relpath(file_path, extraction_dir)
-
-                    # Get file extension
-                    _, file_extension = os.path.splitext(name)
-
-                    # Update kwargs for the file
-                    file_kwargs = kwargs.copy()
-                    file_kwargs["file_extension"] = file_extension
-                    file_kwargs["_parent_converters"] = parent_converters
-
-                    # Try converting the file using available converters
-                    for converter in parent_converters:
-                        # Skip the zip converter to avoid infinite recursion
-                        if isinstance(converter, ZipConverter):
-                            continue
-
-                        result = converter.convert(file_path, **file_kwargs)
-                        if result is not None:
-                            md_content += f"\n## File: {relative_path}\n\n"
-                            md_content += result.markdown + "\n\n"
-                            break
-
-            # Clean up extracted files if specified
-            if kwargs.get("cleanup_extracted", True):
-                shutil.rmtree(extraction_dir)
-
-            return DocumentConverterResult(markdown=md_content.strip())
-
-        except zipfile.BadZipFile:
-            return DocumentConverterResult(
-                markdown=f"[ERROR] Invalid or corrupted zip file: {local_path}",
-            )
-        except ValueError as ve:
-            return DocumentConverterResult(
-                markdown=f"[ERROR] Security error in zip file {local_path}: {str(ve)}",
-            )
-        except Exception as e:
-            return DocumentConverterResult(
-                markdown=f"[ERROR] Failed to process zip file {local_path}: {str(e)}",
-            )
+        return DocumentConverterResult(markdown=md_content.strip())
diff --git a/packages/markitdown/tests/test_files/test.pdf b/packages/markitdown/tests/test_files/test.pdf
new file mode 100644
index 0000000..e82861e
Binary files /dev/null and b/packages/markitdown/tests/test_files/test.pdf differ
diff --git a/packages/markitdown/tests/test_files/test.pptx b/packages/markitdown/tests/test_files/test.pptx
index e6d16f3..fb66302 100644
Binary files a/packages/markitdown/tests/test_files/test.pptx and b/packages/markitdown/tests/test_files/test.pptx differ
diff --git a/packages/markitdown/tests/test_markitdown.py b/packages/markitdown/tests/test_markitdown.py
index 61c9ff7..b44ba00 100644
--- a/packages/markitdown/tests/test_markitdown.py
+++ b/packages/markitdown/tests/test_markitdown.py
@@ -2,6 +2,7 @@
 import io
 import os
 import shutil
+import openai
 
 import pytest
 import requests
@@ -289,7 +290,6 @@ def test_markitdown_remote() -> None:
         assert test_string in result.text_content
 
     # Youtube
-    # TODO: This test randomly fails for some reason. Haven't been able to repro it yet. Disabling until I can debug the issue
     result = markitdown.convert(YOUTUBE_TEST_URL)
     for test_string in YOUTUBE_TEST_STRINGS:
         assert test_string in result.text_content
@@ -298,6 +298,10 @@ def test_markitdown_remote() -> None:
 def test_markitdown_local() -> None:
     markitdown = MarkItDown()
 
+    # Test PDF processing
+    result = markitdown.convert(os.path.join(TEST_FILES_DIR, "test.pdf"))
+    validate_strings(result, PDF_TEST_STRINGS)
+
     # Test XLSX processing
     result = markitdown.convert(os.path.join(TEST_FILES_DIR, "test.xlsx"))
     validate_strings(result, XLSX_TEST_STRINGS)
@@ -336,10 +340,6 @@ def test_markitdown_local() -> None:
     )
     validate_strings(result, BLOG_TEST_STRINGS)
 
-    # Test ZIP file processing
-    result = markitdown.convert(os.path.join(TEST_FILES_DIR, "test_files.zip"))
-    validate_strings(result, XLSX_TEST_STRINGS)
-
     # Test Wikipedia processing
     result = markitdown.convert(
         os.path.join(TEST_FILES_DIR, "test_wikipedia.html"), url=WIKIPEDIA_TEST_URL
@@ -360,18 +360,24 @@ def test_markitdown_local() -> None:
     for test_string in RSS_TEST_STRINGS:
         assert test_string in text_content
 
-    ## Test non-UTF-8 encoding
-    result = markitdown.convert(os.path.join(TEST_FILES_DIR, "test_mskanji.csv"))
-    validate_strings(result, CSV_CP932_TEST_STRINGS)
-
     # Test MSG (Outlook email) processing
     result = markitdown.convert(os.path.join(TEST_FILES_DIR, "test_outlook_msg.msg"))
     validate_strings(result, MSG_TEST_STRINGS)
 
+    # Test non-UTF-8 encoding
+    result = markitdown.convert(os.path.join(TEST_FILES_DIR, "test_mskanji.csv"))
+    validate_strings(result, CSV_CP932_TEST_STRINGS)
+
     # Test JSON processing
     result = markitdown.convert(os.path.join(TEST_FILES_DIR, "test.json"))
     validate_strings(result, JSON_TEST_STRINGS)
 
+    # # Test ZIP file processing
+    result = markitdown.convert(os.path.join(TEST_FILES_DIR, "test_files.zip"))
+    validate_strings(result, DOCX_TEST_STRINGS)
+    validate_strings(result, XLSX_TEST_STRINGS)
+    validate_strings(result, BLOG_TEST_STRINGS)
+
     # Test input from a stream
     input_data = b"<html><body><h1>Test</h1></body></html>"
     result = markitdown.convert_stream(io.BytesIO(input_data))
@@ -441,7 +447,6 @@ def test_markitdown_llm() -> None:
     markitdown = MarkItDown(llm_client=client, llm_model="gpt-4o")
 
     result = markitdown.convert(os.path.join(TEST_FILES_DIR, "test_llm.jpg"))
-
     for test_string in LLM_TEST_STRINGS:
         assert test_string in result.text_content
 
@@ -450,6 +455,14 @@ def test_markitdown_llm() -> None:
     for test_string in ["red", "circle", "blue", "square"]:
         assert test_string in result.text_content.lower()
 
+    # Images embedded in PPTX files
+    result = markitdown.convert(os.path.join(TEST_FILES_DIR, "test.pptx"))
+    # LLM Captions are included
+    for test_string in LLM_TEST_STRINGS:
+        assert test_string in result.text_content
+    # Standard alt text is included
+    validate_strings(result, PPTX_TEST_STRINGS)
+
 
 if __name__ == "__main__":
     """Runs this file's tests from the command line."""
@@ -457,7 +470,7 @@ if __name__ == "__main__":
     test_stream_info_guesses()
     test_markitdown_remote()
     test_markitdown_local()
-    # test_exceptions()
-    # test_markitdown_exiftool()
-    # test_markitdown_llm()
+    test_exceptions()
+    test_markitdown_exiftool()
+    test_markitdown_llm()
     print("All tests passed!")