What's up with the sideways hold while giving that last visual sweep? Is that a lefty thing or is it just easier to do before holstering in either hand?
It is a modification of "position sul", which is a way of keeping the muzzle in a safe direction while remaining ready during a scan, move, etc. In this video, Paul is actually not doing it "correctly", as the muzzle should actually point to the ground (sul=south), and the feet should move during the scan to keep it from pointing at the feet. However, he is keeping the muzzle in a safe direction (downrange), and the positioning of the hands helps keep him conscious of what the muzzle is doing.