How do you change usernames and profile pictures on Youtube?

Well for the username. I am not sure. But for the profile pic. You have to sign into YouTube with your gmail account once you do. You can go to gmail.com and change your gmail profile picture. Than a couple minutes, it'll change it for you in the YouTube account. Hope that helps. :d

I know how to change ur NAME but not necessarily ur user. on ur page there is a thingy to change ur name, but u can't have, for example, "The Brownie" as ur name. I had to go with Jess Pendragon, pendragon from the books, jess from who knows where. MY BRAIN