I agree with the last few posts, the people in authority i.e principals and teachers in this case will not do a whole lot about this kind of thing. Like in this video if a teacher had come around the corner just after the first punch was thrown and that little weed was dancing around like a prat then what would the teacher have done?? probably just have told them to clear off and not cause any more trouble and then the bullies are free to get up to their tricks again as soon as their gone. I've seen this kinda thing happen countless times when i was in school.
I also think that even though we don't know the full story just from this video you can get a good idea in just those 42 seconds of what was going on. It is fairly obvious this kid was being bullied, come on he's just standing there and you can see he wants no part in it while the other kid taunts him and hits him while his friends stand around filming and laughing.
This thing seems to be generating a lot of interest too on facebook alone so far so maybe at the very least it'll generate more publicity for the victims of bullies and give schools more of an incentive to clamp down on bullying.
Another thing to consider is that in may places, self-defense is coming to be considered as "taking the law into you own hands" by authorities. Victims of violence are taking the legal heat, whether criminal or civil, if they successfully defend themselves, while the perpetrators either walk or get a slap on the wrist. Then there's the lawsuits.
Now this I would agree with 100%