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Once you download the app click the link again and it will ask to open the link in the app.

Windows 10. had the app, installed one from the link, clicked on the link from the post nothing happens (well it opens the window where it says to download the app), tried with app working, nothing happened, tried going to your profile on the app, nothing. so looks like i can't watch the video

You need to download the latest rc here. There are few minor things to be fixed before full release within the next day.

this version works

still doesn't open for me