Heyo, no problem. ^_^
Go to your User CP, and go to where it says YouTube URL. There you enter "v/" + video code + "&hl"
For example, my video's URL is
http://www.youtube.com/watch?v=vzeDpZWZicA. I just take the part after the "=" sign and make that the video code. So I enter "v/vzeDpZWZicA&hl"
And then choose Yes if you want it on the top of your profile like mine, or No if you want it just above your biography to the right of your profile.
I hope that helped. Good luck! :D