We're aware and looking into the issue with YouTube Premium. Disabling bluetooth and then selecting another video may fix the problem. We'll continue to share updates here: https://goo.gl/QG4v1Q
We'd like to help. Make sure you're logged in to the right account linked with the subscription. Also, make sure you YT Premium membership has not expired. Here's more info about how to troubleshoot YouTube Premium membership benefits: https://yt.be/help/r2Vy . Hope this helps.