That's not how I see it, the cyclist had the right of way, the van would not have pulled out if it had been a car instead of a chap on a bike.I don't see an issue?
He left room and was safe overtake on otherside of road.
Just cause it looks strange and an unorthodox maneuver doesn't mean it's illegal.
Driver uses hazards to acknowledge then but plenty of room as I say
I've been the victim of that move more than once, when the driver acts as though the cyclist is invisible.