This is great.
On one hand I certainly empathize with the guy following in the truck. If you're in the left lane and not driving fast enough to pass people or faster than traffic, get over.
On the other hand, this doesn't look like an interstate or even a highway for that matter so that rule doesn't really apply. But we also don't know what happened before the camera started rolling.
So, ultimately, I guess I'm with the person doing the recording.
But, then again, she comes across as a complete a-hole laughing at the guy when he wrecks his truck. How did she know he wasn't injured?