I have a sandbox project I built some time ago to synchronize watching youtube videos with friends (https://lifeboatradio.com). A small group of us use it as a shared radio similar to grooveshark back in the day. During quarantine I am trying to build a similar version that allows you to synchronize watching videos from other sources, so I can hold a virtual movie night with friends. Hoping to use the output of this project to improve lifeboat too and bring it back up to date.