So the guy in the car stops short. The motorcyclist gets next to him and starts pounding on the car, telling the driver to pull over. The driver wipes out the motorcyclist, almost killing him, and drives away.
In the interview, the motorcyclist starts talking about how he has a 1 year old kid at home........ he should have thought about that before going up and pounding on the car yelling at the guy to pull over for stopping short. He brought it on himself. He could have just let the guy in the car go away after the short stop. But he didn't. He reacted poorly to a poor situation and got himself deeper into it needlessly.
Of course, the guy in the car shouldn't have done that, either. He could have killed the guy. But my guess is one or both of them are hot-heads. When and if they do catch the driver, he/she will claim they feared for their life because the biker was beating on their window and yelling at them, so they defended themselves. Maybe they could have shot the biker and claimed the same defense; I feared for my life!
The point is, although it appears the car driver is 100% in the wrong at the end of the video, the biker could have driven away free and clear had he not gone after the car for stopping short. He got into a bad situation, and made it worse on himself. Get the license number. Report it to the cops. Go home and hug your kid. That simple.