@Dave
Sure. I was thinking about this as I cycled along to the airport reacting to, first, a Land Rover crossing Melville Street that I wasn't certain was going to stop, then an Audi turning right out of Murrayfield Avenue onto Corstorphine Road / Roseburn Terrace that might have gone across me and a white van coming out of the little shop car park between Kirk Loan and Glebe Road that might have been planning to come out. I think it's more of a chicken and egg situation where riders find themselves in getting into scrapes, which leads, as you say, to getting a head cam, and then continues as before with the scrapes now being recorded.
In each of my non-incidents this evening I could see that something might happen, stopped pedalling and covered the brakes until I'd decided either that it was OK (the Land Rover stopped and the Audi turned sharply into the cars' lane and not into my bus lane) or that I would need to slow down (the white van kept on coming and stopped across the bus lane forcing his way into the cars).
What I think is interesting about your man, in the link crowriver posted, is that the possibility of something happening can be seen before the car even starts its right turn and long before it starts its left turn across his path. I realise I'm watching this comfortably at home and I'm not there but it's plainly not even slowing down for the give way as it turns right. Me, I think I'd have been slowing down before it even started its turn. He seems to have seen it - he's looking at it to point his camera at it, it's indicating but he barrels on. Watching it again, rather than a warning it looks more like his air horn is a rebuke for the right turn as he catches up to the car but he's expecting it to carry on. He does start braking as the car starts to turn left across him. But by that point it's too late.
In a way he's right, in the sense that he has right of way and she's plainly not seen him (in spite of what she says. I think she's stupid and thinks it makes it sound better somehow) and she's a rubbish driver who is wholly at fault at every stage of her manoeuvre but I think his crash was avoidable and somewhere he chose not to avoid but to assert his right. But I agree that it's not the head cam that's influenced his riding. He probably does have a long history of run ins with cars that predate the headcam.