YouTube comes pre-installed from Google Play.
To set up YouTube, from the home screen, tap the Launcher icon.
Scroll to and tap YouTube.
Review the Terms of Service and tap Accept.
Tap the Menu key.
Tap My Channel.
Tap the desired account.
Note: A Google account is required for a YouTube account. If no Google account has been set up on the handset, tap Add account and follow the prompts to set up an account.
The YouTube account is now set up.