Open Source Apps with 'Watch videos' feature
Popcorn Time Online is a web version and real revolution of the original Popcorn Time and based on its appeal and functionality,.
Kaku is the next generation music player that supports many different platform like YouTube, Vimeo ... etc.
The video browser for motion freedom, MotionBox is a desktop client for streaming video that lets you stream videos from YouTube, Vimeo and Dailymotion.
Quasar is a video addon for Kodi that uses BitTorrent to streams movies and TV shows in great video quality.
SyncLounge (Previously PlexTogether) is a tool to sync Plex content across multiple players in multiple locations.