I have a hard time understanding what metastream is... I saw a demo of being able to play a YT video and chat at the same time, invite ppl, etc... Does it suppo

I have a hard time understanding what metastream is... I saw a demo of being able to play a YT video and chat at the same time, invite ppl, etc... Does it support sharing any video stream playing on a browser? (say, netflix). How does it work? EDIT: bizarrely, I found this article on The Verge more descriptive of what metastream does than the website, WIKI and source code :-) [1]. 1: https://www.theverge.com/2020/3/25/21191604/watch-movies-friends-online-netflix-hulu-youtube-party-twoseven-metastream-amazon-hbo-scener https://www.theverge.com/2020/3/25/21191604/watch-movies-fri...