There are always 2 sides to an incident between 2.
The camera can be used as evidence, but only circumstantial, as the actual damage to the car was not shown, or what triggered an exercising individual on a lightweight bicycle to supposedly 'knock' on the car with his soft bodied hands.
The insignificant nobody me had heard from acquaintances whom own cars but take pleasure in driving closely to bicycles INTENTIONALLY, usually using their side mirrors to hit them, & then gloat with pleasure over such incidents, probably because of their dislike of them hogging the roads.....when there is SO MUCH space on even one lane for both to share.....
All it needs is tolerance, to share & avoid unpleasantness. Why spoil a beautiful day hurting & harming others, which will result in civil suits with more time & effort taken? Was the car really damaged, or one's pride & ego?