You can sign out of your YouTube on your TV both with the device and remotely. Follow the steps given below for both ways:

If you have the device

In order to sign out:

  • On your TV, launch the YouTube app.

  • Choose from the menu on the left.

  • To access the accounts page, click your profile picture.

  • Click Sign Out after selecting your account from the list. 

To remove your account:

  • Choose from the menu on the left.

  • To access the accounts page, click the account icon.

  • By choosing it from the list, click Remove Account.

To switch accounts:

If you notice the “Who’s Watching” screen, you can either:

  • Select any account that’s signed in.

  • Add a new account.

  • Use guest mode.

 
 
If you no longer have access to the device or want to log out remotely

  • Open any device and navigate to https://myaccount.google.com/device-activity.

  • Choose the device from which you want to log off.

  • Pick Sign Out.