You aren't listening to "the video". The camera has a zoom lens: It doesn't have a zoom microphone. The sounds on the video are of cars on the front stretch, not the backstretch.
The video doesn't show Tony Stewart's car until almost the moment of impact. It isn't at all clear to me that Tony Stewart sped up before the impact.
There are probably other videos that will surface, but, right now, I don't think the video we've all seen shows Stewart doing anything particularly negligent. I'm withholding judgement pending further evidence.
uh no. It's clearly stewarts car. And since sound travels slower than light it makes it even more damning. In addition, more importantly, you can clearly see the car speed up.
Also stewart had talked about wanting to run another driver over and he's attacked several other drivers in fits of rage.
Granted some more vidoe analysis may come out. But IMO at this point it looks like manslaughter to me