FreeTube - FreeTube is an open source desktop YouTube player built with privacy in mind.
Pretty Good Music Player - Music player that focuses on basics: rock solid music playing.
NewPipe - NewPipe is a lightweight YouTube front-end for Android.
DVDFab Media Player - DVDFab Media Player is a full-featured video player that comes with the support for Blu-Ray, DVD, and HDR10 video support at up to 4K.
Minitube - Minitube is a YouTube desktop application.
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.