Yes Travis did move in front of the truck to meet Arbery, he was no longer “standing his ground” but on the attack/offensive move. He did not want Arbery to get away a third time.
Where was he to run? Turning around would put him farther back into the development, and the roads just loop back to that intersection in front of the pick up truck. Plus Bryon was in the 2nd pick up truck behind them (camera man), who was also trying to stop him.
His only exit to leave the area was ahead of him, jog back onto Satilla Shores and go north to go back home (about 2 miles away)
How could Bryan be trying to stop him if he’s in a vehicle? Run him over? I don’t think so. Again, none of us can see what happened during the initial shot, but Arbery could easily have kept running to the right, past the truck. I don’t know exactly where the road leading out of the subdivision is in the video, do you?