My guess is he'll say you didn't have any lights on at the time or something?
Although I don't think any magistrate is going to think someone who bothers with a head cam would not have lights on. Hopefully you have a longer video to show some of them reflecting from somewhere etc? I think you can just about make a couple of flashes on his bonnet at the end of your posted video. I also guess you have video footage of the aftermath.
Yeh, the video is a lot longer and the police have the full copy, it's mainly him getting out of the car then the 10 min discussion and swapping of details after. Though when I spoke to the lady from the Met about his claim he couldn't see me, she laughed and said she could see my lights flashing in reflection.
I had 2 sets of flashing lights on my helmet, plus the obligatory steady set on my bike, plus a flashing rear one on my back and a black, reflective cycle jacket (and ankle reflector). It's going to be tough for him to prove I wasn't visible, though one guy driving behind him stopped and piped up that he couldn't see me either but then he was a good way up the road behind (you can see him in the video) and shouldn't he be focussing more on what's directly around him and what the car in front of him is doing? But maybe he'll get him in as a witness, I don't know - but they didn't swap details.
I think the guy genuinely believes he's in the right and that he couldn't see me and this worries me because I was more than appropriately lit (the Highway Code only stipulates one set of lights plus fitted reflectors). So I believe he has no cycle awareness whatsover and as such is a danger to other cyclists until he accepts he was in the wrong. I think the course would have done him (and others) the world of good.
If either of us had been going faster, this would have been a lot more serious than just a dented front mudguard and a bashed shin (still got the marks 6 months later).