How do i add a banner on to my youtube channel?

To have a banner ID/logo above your video description box you have to be a "YouTube Partner."

-A YouTube partner is someone who uploads lots of original content which gets thousands/millions of views. They also have thousands of subscribers.

-YouTube partners also get paid $2.50 (2 dollars 50 cents) for every thousand views they receive.

-To try to sign up to the partner scheme follow this link: YouTube.com/partners">http://YouTube.com/partners

(you are likely to be turned down)

Normal users can not have this feature and nor can people with directors accounts.