Loop YouTube videos, and control how long you want to play a YouTube video for.
FacePause - Look away to pause YouTube videos
reEmbed - Custom YouTube Video Player
ListenOnRepeat - 24/7 curated music streams
TabFloater - Browser extension to use picture-in-picture with any website
SongFlip - SongFlip – Free Music Streaming and Player is one of the most popular free music streaming apps, that allows you to get access to millions of songs right over your cell phones.
mps-youtube - Terminal based YouTube player and downloader