There is so much about this video that looks like fake news to me, or at least presents as a sensationalized reenactment. One of the characters in particular strikes me as an actor. I asked my daughter (in Manhattan) about a MASH setup in Central Park. She told me there were tents, but were being used for organized food distribution, in mornings to families with children, later in the day for other people. OTOH, Central Park is a very big place. She might not know.The one on the stretcher being put in the ambulance on 0.18 seconds and counting, is a training mannequin too, look at the hand, lol.
Another thing is that it is very hard to gain hospital access right now. No visitors. So why/how did a film crew even get into a ward?