Intervention d'un policer sur une bagarre entre 2 adolescents

We don't really have context here and we don't really know the back story, but it seems to that the bully was the guy who was being hit, rather then the one who was hitting: the boy who is kicking is saying "quebra eu", asking he guy to beat him up (instead, I assume, of someone else who is weaker).
Also, both the guy who's filming and the guy who's been beaten are making fun of the guy who's beating, saying he smells like "pastel", probably a referring to his job frying/selling "pastéis" (http://en.wikipedia.org/wiki/Pastel_%28food%29). The "bully" is wearing a typical white shirt and a hat in which we are able to see a logo, probably from the restaurant where he works, and the supposedly "bullied" guy is actually making fun of the "bully" because of his smell.
So it is likely that the "bully" was actually a cool guy who was a) defending someone else who was being bullied by these guys and b) mocked by these asshole because of the way his job made him smell.