Honestly I think the cyclist could have taken a better road position. Secondary position is not recommended at a roundabout, you should be in primary to avoid situations like what happened here.
Just watched this film.
I, personally, pushed his car up the road whilst he was out of the car.
He needs locating and locked up.
Although footage needs checking just incase the lorry driver did some thing.
Although producing a bat and dangerous driving isn't acceptable.
One for the cops to deal with. I wonder what was so urgent that this driver felt he/she had to break laws and drive so dangerously.