Or maybe he was ready to start arguing and then he clocked the camera?
Spot on.
The camera was the only reason this ended as well as it did.
I think I heard him ask for acknowledgement for the camera at one point, so he realised he was being filmed.
I believe that is the only reason he was so civilised. Even his opening words were diffused by the sight of the cam "you touch my car and....(spots cam).....its an offence".
Still needs to be reported. Ending "nicely" is not the objective, he needs to be prosecuted for dangerous driving, he admitted seeing the cyclist and still went on to ram him from the road, then uses his car as a weapon to intimidate still further.