So, maybe the van stopped where he did because the lights changed - amber means stop if safe to do so. He perhaps didn't realise this would inconvenience turning buses.
That aside. What is happening here has absolutely nothing whatsoever to do with bike boy...
... but he wants to make it his business.
So, instead of sitting back in the bike lane/box, he goes out beyond this and starts pointing his cam at the van, bus, van.
At around 20s, the van draws back - so bike boy does the same.
but, instead of staying over to the left, in the cycle lane (which is clear @ 26s), he puts himself directly in front of the van (27s) - WHY?
And after the van barely touches him, he starts waving his arms about & talking to the van driver - let's face it, the old boy won't have a clue what this guy is saying as he's probably got engelbert humperdink on full blast.
At 1min, he directs the cam to the bike - it looks barely scratched - yet he starts telling everyone how the old boy tried to run him over & buckled his bike "he just ran over my f#ing bike" (strange how the sound of bike being mangled wasn't heard, how the only sound was biker boy banging on the bonnet).
He then begins his crusade to get the van to move back to allow the buses to turn - by putting himself right in front of the van again (he leans his bike against the bonnet).
Again, this is between bus & van - it has F#ck all to do with biker boy.
And later, he's telling everyone "I was just sitting there and he just drove into me" - well, that's a blatant lie.
And at the end, we go from "buckled" to "not rolling as well as it was".
It's really no wonder the police didn't want to get involved.