It's just another character assassination against Trayvon Martin.
It doesn't matter what Trayvon's character was.
It doesn't matter if he was making drugs with the drink and candy he had bought.
It doesn't even matter if he was winning the fight at the moment he was shot.
What matters is that George Zimmerman followed him against police orders, armed with a gun, based on no evidence other than the clothes Trayvon was wearing. What matters is that George Zimmerman went looking for trouble and couldn't take it when he found it. What matters is that George Zimmerman is solely responsible for everything that happened in that confrontation, up to and including the death of Trayvon Martin. Even if a credible self-defense case could have been built, which I highly doubt, it still remains that he started the confrontation.
In the therapy group I attend, one of the older white men said that "all Martin had to do was call back, 'I'm going home' and everything would have been fine." To which I snapped back, "If someone's following me and doesn't show a badge, I don't have to justify myself to them for anything. Plus, if someone's following me and doesn't identify themselves, I'm not going to give that person my destination or even head for my destination if I think they might be dangerous."
That video is nothing more than another attempt by the Right to assassinate Martin's character, using many of the same tactics that they decry in that very video, especially appeals to emotion, ad hominem attacks and presenting opinions and speculation as fact.