Seen the dash cam video from this really angry bloke, I see no reason why this Fiesta was in the wrong. He had priority on merge and the camera car could have moved left or slowed slightly and been totally fine.
Camera guy has anger issues, and must have been aware of the backlash as he hides his name. Quite pathetic to spend his time editing the video to 'name and shame' this guy too, he really didn't do any as much wrong as you did.
utter knob overtook into oncoming traffic, cut in form of a lorry in poor conditions, cant use indicators