This article will explain how to watch stuff from a Hub. To watch anything in Here, you must first be in a Room. You should see rooms available to enter at the top of the Hub. If anyone you know is in one of the rooms, it will appear larger
If you don't see a room, you can click the PLUS button to make a new room.
Once you're in a Room, you can then invite your friends and watch:
To watch something with friends, select either the screen share icon or the media player icon: