Thanks for this guidance. In times like these, I find sunlight is always the best disinfectant.
The yt-dlp application functions better alongside ffmpeg, so I recommend installing that too. If on Linux, whatever is available via one's package manager /should/ do the trick.
Note, the project does make mention there are issues [1] with "standard ffmpeg", and is therefore minting custom builds [2][3] of ffmpeg, with additional patches applied.
https://github.com/yt-dlp/yt-dlp?tab=readme-ov-file#installa...
> According to webarchive, original video was posted on Aug 13 and the talk took place on April 9, 2024.