NewPipe - NewPipe is a lightweight YouTube front-end for Android.
YouTube Vanced - Vanced is a modded version of YouTube with many features such as adblocking and background playback
LibreTube - An alternative frontend for YouTube, for Android.
FreeTube - FreeTube is an open source desktop YouTube player built with privacy in mind.
YouTube - Our mission is to give everyone a voice and show them the world.
SongTube - Beautiful, functional and fast Youtube Client