In the video a VW Polo car, which belongs to a 67-year-old motorist, can be seen parked on the pavement. A blue quad bike is parked next to it.
An altercation breaks out between two men. One man is seen pulling the elderly man to the ground, punching and kicking him. The attacker then walks back to his quad bike, puts his helmet on and leaves.
The elderly man is seen stumbling back to his car.
Police spokesperson Capt Sandra Janse van Rensburg said that before the assault, the elderly man had confronted the quad bike driver for reckless driving.
She said the Polo owner was admitted to hospital.
Port Elizabeth flying squad police arrested the alleged attacker at his house in Colleen Glen on Sunday morning.