reEmbed - Custom YouTube Video Player
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
TabFloater - Browser extension to use picture-in-picture with any website
ncmpcpp - Ncurses Music Player Client (Plus Plus)
Video Hub App - The fastest way to browse, search, and manage videos on your computer. Like YouTube for videos on your computer!
musikCube - A fully functional terminal-based music player