Coplay connects two users who are on the same video site and let them control both video players simultaneously.
Coplay works on Youku, Tudou, YouTube, AcFun, bilibili, and more. Refer to https://github.com/hwang381/coplay#introduction for the full list of supported video sites.
This is a forked version of the original by @Justineo https://github.com/Justineo/coplay. Go to https://github.com/hwang381/coplay#introduction for a list of improvements over the original version.