The description of the video is horrific. I can't bring myself to watch. I got one of these for the car and one for my backpack in case https://www.amazon.com/gp/product/B00KQS2NGK?th=1

I was 2 h and one block away in spacetime. Wish I'd been there and I hope if a chance arises I will be able to help. Many times strangers have stopped to help me when I was injured. It is sad none like that crossed paths with this poor man.