The video shows protests which happened after a march in the town of Sitra on December 28.
The video opens with shots of the cameraman's bruised body before showing the incident, in which a glowing object hurtles towards him before knocking him over.
The march in Sitra marked the 40th day after the death of Ali Alsatrawi, who was hit by a police jeep chasing youths.
At approx. 11 seconds the canister is shot and just missed taking off buddy's face but hits cameraman in the ribs.