There are definitely some privacy benefits I imagine, as you are not directly utilizing a user account and the YouTube UI. Now if you are asking if it is still possible for google or YouTube to track you the answer is yes, you are just making it slightly harder.

Just self host invidious or use an invidious instance that is maintained? My self hosted one works just fine

The thing I don’t get about these sorts of conversations is if your threat model is so great why are you using a cellular phone at all? Like I get it, I’ve used graphene and I like it but as my daily I’m iOS all the way. Why, you ask? Because at some point you have to realize you are sacrificing a ton in usability in order to gain privacy and security. If I really cared about security I’d install graphene, sure. But I probably would even put a SIM card in the damn thing.