Apple just dropped its new Apple TV 4k on November 13, but some users are running into trouble with the YouTube app.
Instead of videos, they're seeing a black screen with a QR code and an error message saying "YouTube is not yet available on this device," or a red bar warning the app is only for testing, not actual use.
Reinstall fixes YouTube on Apple TV
People have tried updating to tvOS 27.2 and restarting, but The Verge's Tom Warren found that only uninstalling and reinstalling the YouTube app actually worked.
Despite these bumps, John Higgins (also from The Verge) still calls Apple TV 4K "one of the best streaming devices available," even if it's expensive compared to other streaming boxes.