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
Minitube - Minitube is a YouTube desktop application.
YouTube - Our mission is to give everyone a voice and show them the world.
SkyTube - Open-source YouTube video player for Android.
MotionBox - Open-source desktop video player for streaming websites.