How do I fix YouTube error on my smart TV?

Solution 1: Relaunching the app

  1. Grab your TV remote and launch the Youtube App.
  2. If the app goes to the “Grey Screen” press and hold the “back” arrow button and it will take you to the Samsung Smart HUB. The back button on the remote.
  3. Chose the Youtube app again to relaunch it.
  4. Check to see if the issue persists.

For More Information Please Refer: https://appuals.com/fix-youtube-app-not-launching-in-samsung-tv/