SyncPlayer is described as 'unofficial open source Syncplay client for Android. It connects to Syncplay servers to sync video playback between two or more users. Use it to watch videos with your friends online' and is an app in the Video & Movies category. There are more than 10 alternatives to SyncPlayer for a variety of platforms, including Online / Web-based, Mac, Windows, Linux and Google Chrome. The best alternative is Syncplay, which is both free and Open Source. Other great apps like SyncPlayer are Watch2Gether (Freemium), Sync Video (Free), TwoSeven (Freemium) and TurtleTV (Free, Open Source).
Syncplay program allows you and your friend/partner/family member to watch same video file simultaniously on different PCs and different location by syncing playback of MPC-HC, mpv, mplayer2 and VLC players.
Watch2Gether lets groups of users watch videos in-sync together. At the same time users can communicate through a build-in chat-room and use web cam and audio chat. Available media sources are Youtube, Vimeo, Dailymotion and Soundcloud.
Web application that enables people to watch the same thing at the same time across the globe while interacting via video and text. Currently supports Netflix, Amazon, YouTube, Vimeo, Crunchyroll, etc.
Listen or watch your favourite content via Youtube on repeat, shuffle or synchronized on all your computers at the same time. Take turns DJ'ing. Enjoy private or public rooms by yourself or together with your friends in sync.