What in the heck is my YouTube username? I created an account a while ago using google, but I forgot my username and password. I was able to successfully change my password, but I cannot change my username or find out what it is. Is my username my entire email address that I originally signed up with? Is it only the first part of the email address, minus the aol.com part? Is it my first and last name? Is it just my first name? I have tried all of these and keep getting told that it is incorrect. I am 100% positive that my password is correct, so the username is the problem. Does anyone have any insight?