How can I change my youtube user name OR make a video private?

Answer one; I'm sorry but unfortunatley, You can't change your youtube username, If you wish to do so, You're going to have to make a whole different account, with the user name you wish to change it to.

Answer Two; Making a youtube video private, Go to http://youtube.com/my_videos, Then go to the video at the side it'll say edit video info. Click that, then Broadcast Options: Private Viewable by you and up to 25 other people.

My pleasure! :) Report It

I dont think you can change your Youtube user name to be private, you can make your videos private by choosing a option, when you upload a video, just choose, not to be shown in public, or direct with your friends...