You were lane hogging and don't deny it. That's why that chap in the pretty little 1 Series undertook you. You're a menace to other motorists and force us to make such manoeuvres as you refuse to adopt proper lane discipline.
God you're an idiot.
So you've for some odd reason decided your the authority on cycling education or more to the point taking a video showing none of the things your advising and typing some ill judge crap .
Either that cyclist came from the pavement or his road positioning was awful to begin with , why would he drop back to the curb after going past the first two parked vehicles when the white van was meters ahead .
Also he's all over the road like someone out of an 80s teen film and makes zero attempt to observe what's going on around him , also if your that dangerous you should maybe consider a helmet and cycle clips for your trousers .
Cockerel.