I have nothing to do with that kid's vid, I was at the GE trying to buy something when I happened to see him walk by, so I decided it'd be funny to follow him and start shouting shit like "omg it's a bug abuser report him!!"
The DC bug was the result of the client temporary not being able to display an alt character and crashed when you entered it. It was very widely leaked, and most likely not discovered by a bug abuser but some random kid who was having fun typing random alt codes.