Togetherly - Watch Youtube with friends
Facebook Live Video and Collages - Show your friends what you’re seeing in real time
ShareTube - Watch YouTube, synced with friends.
X (Twitter) - Connect with your friends and other fascinating people. Get in-the-moment updates on the things that interest you. And watch events unfold, in real time, from every angle.
Showgoers - Showgoers is a website dedicated to watching Netflix movies together with friends or loved ones who are not sitting on the same PC.
Live Video On Tumblr - Tumblr's answer to Periscope, Facebook Live and Twitch