looks like they dropped off the medics, then took off until the medics were ready to evac. the patient would need to be stabilized before transport and the pilot certainly isnt going to hover there like that until they were ready. the pilot may of left a healthy medic/crew member if they did not have enough power to take off at that altitude. Those helicopters do not have a ton of spare power and at those altitudes/temps, they will be power limited even further. .