This Invidious instance still works. Don’t push it too hard, though: it’s all we’ve got.
Also, if you log in to YouTube in Chromium or something (assuming you’re on desktop) and then use yt-dlp with the --cookies-from-browser chromium
argument, it should work. This is also possible on Android via Termux and iOS via iSH if you copy ~/.config/chromium
to the app.
Honestly, this sounds like a job for Tor. Install Orbot, possibly enable a bridge, and you should be good to go. Onion Browser is recommended for use with Tor, but Safari will work just fine.
I have never tried calling over Tor, but I have never had an issue with the speed before (although it is inherently slower than a VPN).
Tor Bridge Types