This analysis seems to make sense. If it has been done correctly, it is evidence of a second Las Vegas shooter. It is evidence not only of two sets of gunshots but of bullets hitting the ground from two different distances. So unless the bullets were being fired into the ground only, it seems people will have been hit.
On the other hand, we have what seem to be videos of crisis actors carrying pretend wounded people into a hospital, and we have videos of hospital visits with alleged seriously wounded people who have had an almost instantaneous recovery. As the letter from the purported military surgeon pointed out, quick recoveries from gunshot trauma are not the norm. Remember also the Republican congressman, Steve Scalise, who was shot in the hip last June in D.C. He was in critical condition for some time and was in no condition to be giving interviews a couple of days later. Yet, here is a video of a young woman allegedly shot in the hip at the Las Vegas concert all rosy cheeked and chatting away a mere 3 days after being "nearly paralyzed" by her gunshot injury.