Judging from what's said in the video, this is just a bunch of young punks looking for entertainment - it seems the guy holding the camera actually starts cheering for the white dude, suggesting he doesn't care one bit who wins, he just wants to see some action.

Knuckle dragging thug behavior, but for once, I don't think they were being racist.

If I had to guess, the guy instigating this fight is the lowest status member of the group, and the others have put him up to it. They know it's a bad idea, which is why they're not doing it themselves, but they're bored and their 'friend' is a useful fall guy for their fun.