The best alternatives to Kalisi are ShareTube, #exportFB, and WWDC Together. If these 3 options don't work for you, we've listed a few more alternatives below.
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WWDC Together is a free place to watch and hangout during WWDC. We can now view upcoming and previous sessions via modern playback, with a chatroom for each session. Hope this provides a similar WWDC vibe.
Browse and watch YouTube videos together with friends. Create a party in one click. No signup. No ads. 100% free. Twitch, Facebook and Soundcloud coming soon.
HMU is building a digital living room! They're creating a group video chat platform that lets you and your best friends interact & watch content together. Easily watch gaming content from Twitch, Mixer & Youtube all in one place with friends
Vadio is a platform that allows you to share what you are watching in youtube in real time. Share your channel link with your friends or whatever you want and the users that connect to your channel can see what you are watching in the exactly same time. Even can add videos to the playlist, chat and play with the playlist.