The video quality makes this uncertain, but, the talker at the video posted at #67 above claims that the back window of the SUV is shot out at 7:08, while Lavoy still has his hands up.
Incoming? Outgoing?
You are right about it being hard to watch, that is for sure...
Clearer video (FBI post on YouTube) shows the “irregularity” in the rear window before the SUV went into the snow, I think...
It's not an SUV, it's a pickup with a camper shell on it (watch the line near the back of the cab and where the front of the bed would be, and you can see the original high-mount-brake-light on the back of the cab glowing as the brakes are hit). So, unless there's someone in hiding in the pickup bed under the shell, any outgoing shots will have been out from the cab of the pickup through the camper shell, and out the rear of the camper shell. Unlikely, but not impossible.
I stopped watching after Finicum was shot and he fell. So I don't know if anyone came out the back of the pickup via the shell. But if all occupants were in the cab, then any shot taking out the rear window was likely an incoming shot.
Also, Finicum appears to reach with his right hand to his left hip a couple of times. Was he right-handed or left-handed? Is the left hip where he kept his firearm holstered? If he was a lefty, it makes sense to have the holster there, unless he's a righty using a cross-body draw.
If he's a lefty, and he's reaching with his non-dominant hand to remove his firearm, then it appears he's trying to surrender. If it's a cross-body draw, then I don't know what his actions are. But even as he attempts those reaches, he's still showing hands in the air when between attempts, even once trying to reach with one hand, while the other is in the air, which, again, lends credence to an attempt to surrender.
This video is inconclusive, but doesn't put either party in any better light. If the police did shoot at the first stop, with no apparent action by the vehicle occupants, other than showing hands out the window, then the fleeing is justified. I would run, too, if I were attempting to surrender or talk, and someone just opened fire on me and my vehicle full of people.