Youtube.com/activate You are trying to setup up the YouTube account, enter the code Youtube.com/activate. Users can easily activate YouTube using activation code and enjoy streaming on your Smart Device, Apple TV, Computer, and Mobile. A YouTube activation code is a is generated by the youtube app on certain devices, for eg Apple, Xbox Wii, etc, or other connected devices, which is done through a google account. The activation code is required for the initialization of the sign-in process. To receive a youtube.com/activate code for the app, users need to sign in to their Google account either through Gmail or Google+ account that is linked with their YouTube account. Once an account is synced, the user is prompted to give it access to their device and the YouTube app.