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Youtube-dl also gives you this ability. My sense is that Google doesn't like it but doesn't want to deal with the PR fallout of banning tools like youtube-dl at the moment. Perhaps if this gets popular enough Google will do something.

NewPipe isn't on the Google Play store. I assume that this app can't be either.

Brave already blocks ads on YT (on mobile and desktop).

Actually, I should have catch up a bit about what brave is. For those who have just heard about this like me: https://www.youtube.com/watch?v=OG981gXqdU4