SmartTube is an advanced player for Android TVs and TV boxes, free & open source. You can play content from different public sources.
✅ Features: no ads ‧ SponsorBlock ‧ adjustable playback speed ‧ 8k support ‧ 60fps ‧ HDR ‧ read live chat ‧ customizable buttons ‧ no Google Services ‧ helpful international community
❌ Disadvantages: no support for phones and tablets, no comments stability, voice search and casting support might be worse than in the official apps, depending on your device; give it a try!
Do not download SmartTube from any app store, APK websites or blogs; these were uploaded by other people and may contain malware or ads. SmartTube is not officially published on any app store. Sadly, the Google PlayStore does not allow ad-free Youtube apps using unofficial APIs.
There is a beta release (recommended) and a stable release. Beta gets new features and bugfixes faster than the stable release.