Long downloads fail and cannot be resumed

[paulnsk]

Version

All versions

Platform

Windows 11

Steps to reproduce

Pick a 3+ hours long video, select 4k resolution, start the download.
Example: https://www.youtube.com/watch?v=T-Yenmm-2yo
My connection is slow, the download speed is around 2 MB/sec, that's why I need to pre-download 4k videos before watching them.
The download takes something like 6 hours. If a connection drops during this time the program seems to be able to restore it automatically and continue to download.
However, at some point it shows "Failed" and there is nothing that can be done: I have to restart the app and re-enter video URL and it starts from zero.
Can this be automated? Can the app continue from where it failed (if the file exists) rather than starting from zero?
Sometimes it takes 10 attempts to download 1 video and it sucks watching it fail at 95%.
I can help with the coding if you point me to the right place in the code.
Thank you.

Details

Expected: Videos should be downloaded till the end.
Actual: Downloads fail before reaching 100% and don't resume.

Checklist

• I have looked through existing issues to make sure that this bug has not been reported before
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