OpenTogetherTube is described as 'lets you watch videos with your friends as easily as possible. It's completely open source, and able to be easily self-hosted via provided docker images. Has support for: - Youtube - Vimeo - Dailymotion - Reddit - Tubitv' and is a Watch Videos Together Tool in the Social & Communications category. There are more than 25 alternatives to OpenTogetherTube for a variety of platforms, including Online / Web-based, Windows, Mac, Android and iPhone. The best alternative is Metastream, which is both free and Open Source. Other great apps like OpenTogetherTube are Watch2Gether (Freemium), Hyperbeam (Freemium), Kosmi (Free) and CyTube (Free, Open Source).
Listen or watch your favourite content via Youtube on repeat, shuffle or synchronized on all your computers at the same time. Take turns DJ'ing. Enjoy private or public rooms by yourself or together with your friends in sync.