Thanks for reaching out. You can use your phone to control the YT experience on TV, using this icon. Have you tried casting your app to a TV earlier? Also, could you check if there are connected devices by going to the settings of the app and then 'Watch on TV'? Let us know.
@TeamYouTube I’ve gotten this red symbol when watching videos recently. I don’t have a smart TV or anything like that, so what does it mean?pic.twitter.com/BCarTZ2i4V
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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