Awesome :) Yep, we're nice and friendly folks here!
I believe you need to get supporter status by donating to the site first, then it's a matter of setting a blank Youtube video as your profile pic and putting your actual profile pic as a background image. I think some elements of your profile have to be set to "transparent" color as well to get rid of borders around the blank YT frame. Again, I believe that it's only Supporters who have the permissions to do some or all of this. And I set up my profile so long ago I forgot the exact steps I used... it's posted somewhere on here, though, perhaps in Help or Computers and Technology.