Google is currently on witchhunt for alternative #YouTube frontends: They target the services as well as their users.
In the last week, #Invidious instances first got IP banned, and once that was circumvented stopped via heavy rate limits.
Now they manage to associate #NewPipe users with google accounts somehow, and suspend these accounts:
https://github.com/TeamNewPipe/NewPipe/issues/2723
Now that these frontends got #Google's attention, I don't think we can sustain this cat & mouse game for long. 😔