I am trying to login to my iPad 1's native YouTube App to make use of the "subscriptions" page but every time I try to login I get the "Authentication Failed" message. I am using my full gmail address ie. firstname.lastname@example.org as the username. I've googled this issue and tried everything I found including turning wifi/airplane mode off then on, restarting the app and ipad, as well as making sure my google's 2-step verification status is OFF. Anyone else had this issue and know how to fix it?