I can no longer sign in with my Youtube account username, instead, I am forced to set up a google+ account and sign in through that. Fuck you Google, fuck you!/rant.
Once you make a new username a thing should pop up asking you for you to use your real name, or google name. Click one of the first 5 buttons, that will keep you from using your name instead of a user name. Incase somebody has not noticed yet.
one problem I've been having with youtube a lot lately is when I go full screen mode it only fills in the window. I've figured out how to fix this but it's a pain in the ass