I've seen plenty of fights in my time, and I am simply not buying the story of the "new little Asian kid vs. the biggest bully in the school".
That's total garbage.
Notice how confident the Asian kid was? If you're just some poor new kid who's getting picked on by the biggest bully in the school, you're not going to arrive at a fight. You're more likely going to be running for your life all the time trying to avoid a confrontation with the bully. Not only that, but did you see how confident he was when he took his shirt off? For one, He was pretty jacked for a young Asian kid, and he didn't seem the slightest bit frightened by the "bully". Also, anybody knows that you don't fight with braces on.
What we have here is a video of two willing participants who wanted to settle things out of school. One, the Asian kid, obviously has fighting skills and was confident in his abilities. The other kid was a clueless fellow without much skill, who didn't know he was outclassed from the beginning and didn't know he shouldn't be fighting with braces on.