That's odd. Make sure you're logged in using the right account which has YouTube Premium subscription. Also, check if you're using the most updated version of the app. Let us know if it's still not working.
@TeamYouTube yo dudes! I can't play all videos from the background. Wtf I pay for that feature I want to use it with every video reguardless of how you feel. Explain why I'm paying for features and I'm not getting them.
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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