Blue Order

There's no doubt that it's difficult to see what happens in part of the clip. But just taking the part that we can clearly see, the guy with the bike is using a weapon, the other guy isn't. Given the circumstances of the incident (two guys of approximately the same size, no deadly force threatened by the guy without the weapon), the use of the weapon is disproportionate to the threat, and therefore, not "self-defense." There's more. Once the guy with the bike has hit the other guy a few times, the other guy stops fighting. Then the guy with the bike charges him again. Even if everything that happened before was self-defense, at the point that he hits the other guy again, after he's stopped fighting, the guy with the bike has committed assault.

And then there's the question of who hit who first. It's somewhat difficult to see, but it's not impossible to see. I had to play it repeatedly before I saw the first blow, and it came from the cyclist. They're both walking, the cyclist suddenly swings and cold-cocks the pedestrian, the other guy charges into the cyclist, and then the cyclist really starts hitting him. It wasn't self-defense, at any point in the incident--it was assault.