Just watched the video. It seems they were moving at some speed on a forest road. And the passenger front tire edged off the road where there was a drop off. This forced the truck off the road at reasonable speed.
Since I have a cabover, I learned not to go so fast on forest roads that seem to be rather smooth.
It does not take a genius to decide "we are not in a hurry"
At a slower speed, the driver may have had options.