I don’t know, but I have a feeling it doesn’t. He just pushed a blog post on it and I’m reading it now

They have private/internal APIs that they get grumpy at you for using because you can circumvent ads. The goal with this app was to not make Google grumpy.

EDIT: got to the answer - no.

Does it block ads? It doesn’t, I don’t think Google would like that, but if you have YouTube Premium you won’t see ads, just like the website. Honestly, YouTube Premium is like one of the most essential subscriptions for me, it’s so handy to never worry about ads and it’s pretty cool in that it also supports the creators substantially more than if you watched ads. So I dunno, if you can afford an expensive Apple Vision Pro, I’d really consider treating yourself to YouTube Premium!