seriously? you don't even have to use a real name. mine is "Knight Fox" (bc apparently "Night" isn't a valid first name)
Because not everyone expected youtube to make a drastic change such as becoming a Social Networking site.
So most people probably put their real name or a fake persona.
In that case if you wanted to do what you're suggesting it would require making a brand new account.
Seems like a bit of a chore yes? Especially if you have a lot of videos to re-upload.
Just because in your case it isn't a bother doesn't mean that it isn't for others.