The headline is false. The guy, Arbery, was fighting for the shotgun when he was shot and killed.
The video shows he attacked the man with the shotgun.
We do not know exactly what happened seconds before.
Arbery never stopped. The video shows him going from jogging to attacking.
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Kind of.
Guy was running down the street, rural street.
Truck on the road. Guy in truck bed with shotgun, guy on left side of road with shotgun.
Runner runs to right of the truck. A gun shot goes off.
Guy appears past truck and begins to fight with guy on street with gun.
Second gun shot.
Runner lands a solid punch on face of the guy with gun.
Guy with gun shoots him.
Don’t know who shot the first two or why the first shot went off.
Runner should not have engaged them despite probable provocation.
He should have just kept running.
Runner runs to right of the truck. A gun shot goes off.
I did not see what you see in the video.
I see the runner runs on the right side of the truck, then at the guy with the shotgun.
The guy in the back of the truck does not have a shotgun.
The first shot goes off in front of the truck. It is screened by the truck, but it appears the runner is very close to the man with the shotgun.

Here is an image from the video, about the time of the first shot. The head and foot to the left of the truck are of the man with the shotgun.
I am not sure if you can see the runners foot by looking under the truck, but he is clearly in front of the truck.