If you use yt-dlp through tor it will be worse: 403 almost every request. I don’t know if youtube treats tor exit nodes different or it’s because other people also uses that address and generates a strange behavior which youtube flags.

What’s works best for me is using my own residential ip and waiting like an hour between downloads. Throttling doesn’t seem to help.

Regarding how to torify, you can install tor with apt and it will act like a proxy. Then you can use yt-dlp proxy settings

I use it as a daily driver for years now. Just a few things to learn on top of regular linux and you are good to go. Feel free to ask anything.

You are more protected from supply chain attacks but I think it’s not a long term solution