Amazing SHANTUI Bulldozer Pushing Soil With Hyundai 25TON, SHACMAN Trucks Pour soil on the sidewalk 

there just swatting fly's

As a trucker, I believe I'm qualified to say, if the ground guy's hand is behind the truck, the driver can't see if he's signaling to back up, turn, or stop. He needs to keep his hand in sight of the driver's mirror.

The drones do not have microphones. He is recording and dubbing it in as background noise. So it won’t be like a silent film.

The last few feet of land is usually unstable, so the truck could sink. The bulldozer needs to pass several times over the ground to consolidate it first, then the trucks can pass over it.

This is not good for putting fake sounds