Just the Invidious instance I found on the official list a long time ago. I like them because they’re relatively local, super reliable, and unlike a lot of other instances they actually have the download feature enabled. But yeah, their domain name is a bit awkward, lol.
I can’t speak to the paid ProtonVPN service, but their free tier doesn’t allow torrenting. They’ll disconnect you with a slap on the wrist error about it.