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.
That's not what that experiment is showing. If you move the trigger by 1mm and jostle the slide, nothing will happen. You have to take the trigger _to the wall_, and then 0.5mm further, and then wiggle the slide.
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.