Want to install YouTube on your mobile phone? It's easy, but remember you need to set up your mobile phone for internet and activate your Apple ID before you can download and install YouTube.
Find "App Store"
Key in YouTube and tap Search.
Return to the home screen
If you're asked to log on to App Store, do this.
Wait a moment while the application is installed.
Tap the Home key to return to the home screen.
*Please refer to the Apple website for more information or further support.*