MultiViewSync - Youtube Views Completer Scripts
MultiViewSync is a ready-to-run PHP script. Your visitors paste in a few YouTube links, line them up to the same moment, and watch them together — races, multi-angle streams, panel talks, reaction videos. You keep every visitor, and every ad impression, on your own domain.

https://script.tweetkar.com/product/multiviewsync-youtube-views-completer-scripts