To get started.Tap Get Started.To access the main screen.Unlock your smartphone’s screen.Select Applications from the list on the settings menu.Until you find Apps.Manage the YouTube App
Go to your YouTube account and log in. Select the Account option from the menu at the top of the screen. In the bottom section of the page, click Delete Account. Specify why you’re closing the account. … Fill in the blanks with your current password if prompted. Select one of the Delete My Account options to complete this task.
Uninstall the YouTube app from Settings -> Apps > Apps & Features > Select the app, and then press Uninstall. Or right-click the program on the Start screen and choose Uninstall.