This is why they tell ALL road users to try and NOT over-take on a bend, across a junction, and in people's blind spots. You have to read the road as best you can.
Whilst I don't condone any actual infractions regarding the VED or insurance, neither do I condone the biker's actions.
Just chill a little? The start of the video is a give-away..you, the biker, seem to be pedantic for the sake of it. You appear from a blind spot..people slowed down, assuming you might go into lane 1; hence they would wait and let you pass, or proceed VERY slowly. You would have lost nothing by braking and brushing it off.
Secondly, don't react. Don't interact. You are giving the other party potential ammunition - I've seen your other video's and the way you swear and give the finger will most likely work against you. Observe, don't absorb.
Michael go back to bumming tiddlers