[BUG] Error partially downloading video

[ChristineTham]

🛑 DO NOT REMOVE OR SKIP THIS ISSUE TEMPLATE 🛑

Issues with incomplete or missing information will be closed automatically.

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🐞 Bug Description

Provide a clear and concise description of the bug.

pytubefix has error after partially downloading video

🔢 Code Snippet

Include the minimal code snippet that reproduces the issue.

# Insert your code here n/a

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🎯 Expected Behavior

Describe what you expected to happen instead of the observed behavior.

Complete downloading without error

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📸 Screenshots or Logs

pytubefix https://www.youtube.com/watch\?v\=mIlpTOX3lMk -f /Users/xxx/.local/bin/ffmpeg
Loading video...
GTA 5 PS5 All Cutscenes Full Movie (2022) 4K ULTRA HD_video_0 | 18657 MB
Traceback (most recent call last): | 4.1%
File "/Users/xxx/.local/bin/pytubefix", line 10, in
sys.exit(main())
~~~~^^
File "/Users/xxx/.local/share/uv/tools/pytubefix/lib/python3.13/site-packages/pytubefix/cli.py", line 352, in main
_perform_args_on_youtube(youtube, args)
~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
File "/Users/xxx/.local/share/uv/tools/pytubefix/lib/python3.13/site-packages/pytubefix/cli.py", line 305, in _perform_args_on_youtube
ffmpeg_process(youtube=youtube, resolution=args.resolution, target=args.target)
~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/xxx/.local/share/uv/tools/pytubefix/lib/python3.13/site-packages/pytubefix/cli.py", line 153, in ffmpeg_process
_download(video_stream, target=target, filename=video_file_name)
~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/xxx/.local/share/uv/tools/pytubefix/lib/python3.13/site-packages/pytubefix/cli.py", line 88, in _download
stream.download(output_path=target, filename=filename)
~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/xxx/.local/share/uv/tools/pytubefix/lib/python3.13/site-packages/pytubefix/streams.py", line 398, in download
for chunk in request.stream(
~~~~~~~~~~~~~~^
self.url,
^^^^^^^^^
timeout=timeout,
^^^^^^^^^^^^^^^^
max_retries=max_retries
^^^^^^^^^^^^^^^^^^^^^^^
):
^
File "/Users/xxx/.local/share/uv/tools/pytubefix/lib/python3.13/site-packages/pytubefix/request.py", line 154, in stream
response = _execute_request(
f"{url}&range={downloaded}-{stop_pos}",
method="GET",
timeout=timeout
)
File "/Users/xxx/.local/share/uv/tools/pytubefix/lib/python3.13/site-packages/pytubefix/request.py", line 35, in _execute_request
return urlopen(request, timeout=timeout) # nosec
File "/Users/xxx/.local/share/uv/python/cpython-3.13.13-macos-aarch64-none/lib/python3.13/urllib/request.py", line 189, in urlopen
return opener.open(url, data, timeout)
~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^
File "/Users/xxx/.local/share/uv/python/cpython-3.13.13-macos-aarch64-none/lib/python3.13/urllib/request.py", line 495, in open
response = meth(req, response)
File "/Users/xxx/.local/share/uv/python/cpython-3.13.13-macos-aarch64-none/lib/python3.13/urllib/request.py", line 604, in http_response
response = self.parent.error(
'http', request, response, code, msg, hdrs)
File "/Users/xxx/.local/share/uv/python/cpython-3.13.13-macos-aarch64-none/lib/python3.13/urllib/request.py", line 533, in error
return self._call_chain(*args)
~~~~~~~~~~~~~~~~^^^^^^^
File "/Users/xxx/.local/share/uv/python/cpython-3.13.13-macos-aarch64-none/lib/python3.13/urllib/request.py", line 466, in _call_chain
result = func(*args)
File "/Users/xxx/.local/share/uv/python/cpython-3.13.13-macos-aarch64-none/lib/python3.13/urllib/request.py", line 613, in http_error_default
raise HTTPError(req.full_url, code, msg, hdrs, fp)
urllib.error.HTTPError: HTTP Error 500: Internal Server Error

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🖥️ Environment Details

Fill in the details below about your setup:

• Operating System: [e.g., Windows 10, macOS Monterey] macOS
• Python Version: [e.g., 3.9.7] 3.13.13
• Pytubefix Version: [e.g., 1.2.3] 10.10

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📋 Additional Context

Add any additional information or context that might help us resolve the issue.

pytubefix installed via uv tool install pytubefix

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🚀 Next Steps

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