I take it you didn’t see Abery run toward the truck in the video.
He was between two trucks, if he came to the camera man, he was in Truck number 2 who was also in pursuit of Arbery.
Truck number 1 passed him, Truck number 2 was behind him.
To continue his “jog” he passed Truck number 1.
Again, neither had the right to block his passage on the public street.