Quick answer
Open YouTube, choose Sign in, then pick the TV's Google account or choose Sign in with your phone and enter the code at yt.be/activate.
Sign in on Xiaomi
- Open YouTube from PatchWall or the Google TV home screen.
- Choose Sign in.The device's Google account is offered first.
- Another account?Choose Sign in with your phone and enter the code at yt.be/activate.
- Allow access on your phone.
Opens Google's official page in a new tab. Type your code there, never on any other site.
Xiaomi fixes
These paths are from Xiaomi's TV Box S (2nd Gen) support pages. Xiaomi TVs are similar, and names vary by model.
- Clear the app: Settings → Apps → See all apps → YouTube → Clear Cache. Clear Data also signs you out.
- Update YouTube: Google Play Store → profile icon → Manage apps & games → Updates.
- Update the device: Settings → System → About → System update.
Questions people ask
Is YouTube on PatchWall the same as on Google TV?
Yes. PatchWall is Xiaomi's home screen on top of Google TV or Android TV. The YouTube app and its sign-in are the same.
How do I update YouTube on a Xiaomi TV Box?
Google Play Store → profile icon → Manage apps & games → Updates → Check for updates.