FYI: Fennec (aka: the Fdroid version of Firefox without the google play shenannigans) + uBlock Origin works flawlessly. I also use ProtonVPN with Secure Core to a North America Server via Switzerland, and most of the time, Youtube doesn't block me, and if it does, I just disconnect and reconnect to get a different server.
I know this isn't an "app" you hoped for, but it's how I've been watching youtube for the past few years.
(Yes, I'm aware of the Andy Yen twitter controversy, I'm keeping an eye on the situation)
oh yeah, i had heard of that, i just didn't recognize the name. honestly it's made me consider offboarding from protonmail (only on the free version) since i have aliases on my own domain anyway