This feature is currently available only to rooms in the 
During Premier League games, pick a game from the stream menu in your room to show a Gamecast to your viewers. Premier League Gamecasts will show live score and game clock so that all participants can get synced up with the game, no matter where they’re watching it.
Availability
Premier League Gamecasts are only available for select nationally televised games at the moment. To see which games will be supported, you can check the stream schedule in your room.
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