This last one is the most damning IMO. You can dismiss it because there's a screw in the trigger but he shows in a separate video that it's not actually screwed

This last one is the most damning IMO. You can dismiss it because there's a screw in the trigger but he shows in a separate video that it's not actually screwed into the frame or anything - it's just there to keep the < 0.5mm of slack out of the trigger. Once that's accomplished, all you have to do is wiggle the slide around for a round to get discharged. He does it on the first attempt - even he didn't expect it to be that easy. It's very easy to see how a police officer jostling around with a suspect or getting in and out of their car can cause the trigger and the slide to move at the right time to cause this issue.