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SmartTube is a free and open-source YouTube client for Android TV and TV boxes. It removes ads, supports SponsorBlock, works without Google Services, and is designed for large screens and remote controls.
Note: the developer recently disclosed a build environment compromise and has since rotated keys, rebuilt the environment, and added additional verification steps. Users should update to the latest version and verify sources. GitHub: https://github.com/yuliskov/SmartTube
I wish they made something for Linux. I just used something called "VacuumTube" so I can use it on my steam deck, but literally just today I'm locked out of using it now. It says some error about "the video file is encrypted and can't be played, try logging out" and now it doesn't work on my main YT account. Ugh ...
Edit and a foreboding warning from my other comment:
It turns out my account was a part of some A/B testing "experiment" that makes ALL YouTube videos encrypted, so third party apps don't work. It wasn't VaccumTubes fault. The only way I could get around it was by switching accounts. It makes me worried that YouTube will go through with this "experiment" and screw over many other programs like the suggested FreeTube in the near future. They already use this encryption on the TV and Movies you can "watch free with ads" on YouTube. I guess YT wants to use it for normal videos too. Yikes.
Maybe have a look at Freetube.
Thanks, will do!