I'd throw a flag on that and ask for replay video evidence.
Was the video not clear?, did it have the "hide white persons" filter applied the whole time and specifically when the white kid is knocked unconscious and continued to be beaten while on the ground after he's not moving?
The video doesn't "appear" (LOL at idiots oblivious to that low brow wordsmithing from author at HuffPo) to show a black group beating up a white guy, it clearly shows a group of blacks beating up a defenseless and helpless white guy. Not sure we need to get our panties in a bunch about what occurred being racist in nature to properly address what we are seeing. Lets just call it what it is. Reversing the races might help, then remember where pieces are and substitute appropriately when you figure out, ding!, a group of whites beating up a defenseless black kid to the gruond and then countinuing to kick the kid in the head while unconscious is racist and should be treated as a hate crime.
Does a white mob really beat a helpless black kid who did nothing to provoke the attack, to the point of continuing to beat and kick him in the head while he's unconscious unless hate is involved?
I doubt if the video showed a clear group of whites beating a helpless black kid to the ground and then stomping his head, that we'd have anyone so brazenly stupid to call attention to the unseen blacks that we must not forget! You just can't see them, and they weren't beating the black kid, but they're REALLY IMPORTANT!
Idiot.