mpvsync

• Multiple groups of people can watch at the same time independently on one server. This means that if somebody in one group presses play or pause, only clients connected to this group receive the command. You can specify the group with the --group parameter in the client or by appending it to the URL for the web version (e.g. https://mpvsync.de/mygroup ).
• You can only play video files in the browser that your browser supports. Typical browsers support web and mp4.
• mpv must be installed for local playback. Tested with version 0.32.0