Don’t Mess with this Girl
According to an article at videosift.com this footage was taken from a news story in China:
"Prelude: Anchor:... to his dismay, the little girl turned out to be a Taekwondo black belt and he was pwn'd. When he tried to escape she pulled him back inside for another round of pwnage. :-D
Note to man who tried to assault girl: instant karma, baby!