You are assuming what they did after the clip ends. If it was me I would GTFO away from the falling power lines and stop a block away so to not impede traffic or emergency services. The guy could have called right out of frame.

They should have stopped because they witnessed an accident, and were probably more than somewhat at fault.

Going to help when power lines are struck are a great way to increase casualties or create fatalities. Approaching from a safe distance and keeping them in the car is the safest thing to do until responders can get there.

With loose power lines? No thanks.

You don't know if he did a u-turn mid block and came back. He had to at least get out of the travel lane on the main road.