You can't. Youtube only lets you put letters and numbers in your username.
YouTube username is always your original name. The Gmail username is the ID which is used to log in. Then it is your name that shows up.
just the username. not the password
No.
Alex Day's YouTube username is Alex Day. He previously used the username nerimon.
JedwardTV
You go to background and make a background with your username on it using a program such as "Paint" for PC's.
You can't change your username on YouTube, though you may create a second account with a new name.
Miley Cyrus's youtube username is mileymandy
Her real color hair is brown. She has a few videos on YouTube on her channel saying that she is getting her hair dyed magenta.
Click 'Sign in' and then 'Forgot Username or Password' and follow in Steps.
CoCo9