The video speaks for itself.
I can't figure out why he needed to lift the car in the first place. Surely it could have been driven out? Its tires should have been able to cross the forks of the fork-lift truck without difficulty, so why bother picking it up - unless he planned to put it on top of the containers as a prank, or something like that?
From the way he walked off, I daresay he knew his career at that particular company had just ended . . .