I have never had any trouble with cops in this situation. Perhaps because I’m pretty unthreatening in manner and am always scrupulously polite and nice to cops when they approach. And I have been reaching across to the glove compartment for the insurance card...
The composure of this woman is remarkable.
IMO it seems she does not think the wound is that serious, at first. She even says on the video that "he shot my boyfriend in the arm" or "shot his arm off", something like that. I think as it appears her boyfriend is unresponsive, then I think she realizes it might be serious.
Still, she did really well. Probably better than I would have done if someone had just shot the driver of the car I was in and was pointing their gun at me while the driver was bleeding out...