Can't sign in to Youtube TV under any method (including DVR). Changed User Agent Override to Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.66 Safari/537.36. Keep getting this message:
Try using a different browser. If you’re already using a supported browser, you can refresh your screen and try again to sign in.
Have you tried this?