Officers say the boy was recording his friend as he skateboarded along the road when a man driving a dark-coloured Vauxhall car appeared to try and run the boy off the road.
The boy then shouted and the man stopped his car and approached him.
He grabbed the boy before pushing him to the ground and standing on his ankle and foot.
The man then also made the boy delete the footage from his camera before leaving the scene in his car.
The man is described as white, aged about 40, about 6ft 5ins tall and of a large build. He had a long ginger beard and was wearing a hat, jeans and a jacket.Blimey!
Plenty of people in the comments point out that the footage is recoverable. Deleted, in these modern times, doesn't always mean gone for good...
H/T: wiggia via email