After looking at the video on a video editor so that I can get good stills from each frame, I can confirm one major discrepancy and dispel some false ones.
There is definitely a mag in the hallway on the shooters first entry. This is before he moved all the way down the hall and he even looks at it as he moves past. First view appears to be 3 - 4 meters away - in front of where he has ever allegedly been at this time. This mag is NOT the mag knocked loose in the altercation with the escaping person. It is the second mag he steps back into the hall to reload with.
The brass disappearing is total bullshit. The brass hits normally and is all over the place.