Do you want to put your favorite videos on auto-repeat? Or perhaps you just want to repeat a portion a song. Either way, the Auto Replay extension for Google Chrome adds a function button just below the video player. For a taste of sweet irony, load up Iyaz Replay and literally get it “stuck on replay.”
The extension is straight forward to use. Check the Auto Replay box and a video will replay itself until you close the tab or navigate to a new page. It works with any video regardless of length.
Pick it up from the official Chrome Web Store: Install the YouTube Auto Replay extension for Google Chrome