Coulda, woulda, shoulda.
I've shot over a dozen moose, about that many elk and I stopped counting deer at 15 and the moose in that video would never had got up from where it took the somersault on the rock outcrop.
It would have been bled and dressed out on that rock that very day.
As my older bro said when he saw the video 3 or 4 times last evening, "that moose was a gift".