I came across some videos on YouTube thinking they were just another hoax. However, they do indeed appear to show a shooter around the 10th floor, not the 32nd floor, taken by different people at different angles. Muzzle blasts can clearly coming from a different part of the hotel. A friend on Quora suggested it might be a reflection off the sign near the window in question, however is it? Was there a second shooter?
There are a lot of similar videos and they do have what looks like contradictory evidence clearly shown.