Magnatom it does look like that if you had taken the correct line, the car would have entered the RB and you would have come round behind him and therefore no confrontation. But I was not there and it difficult to tell if the speed involved would mean you colliding with him anyway.
I was going to ask if you were signalling, but you were in a right turning lane so maybe no need unless the driver was not local?
But taking your original point, yes some courtesy goes a long way
and you had the forethought to be watching for cars coming onto the RB. And I do take your point about cars behind maybe cutting you up if you had taken the correct line, but was anyone behind you on this occasion and do you have to do it everytime regardless?
Seems to me that anyone posting helmet cam footage sets themselves up to be disected in minute detail, thats why I never will. I could not take it and would be left a dribbling wreck