I had issues with youtube severely capping my download speeds using youtube-dl, but had success with https://github.com/yt-dlp/yt-dlp
Doh. This is what I initially wanted to link to in the comment. yt-dlp definitely is the better fork, and they seem to address YouTube breaking changes faster than youtube-dl.
Don’t give them ideas :D
They will start selling the past to us. YouTube Archive Plus.