Sorry chrissa. That sounded a bit blunt. It`s a hoax. If an aircraft has a malfunction or the threat of a malfunction (faulty indicators of fire or something) the only vehicles which would be allowed anywhere near it are fire engines and the best they can do is chase you down the runway. Mind you, on a certain high risk destination, we used to have a police escort on pushback. Four cop cars (one at each corner) used to escort us to the runway and then bu@@er off. I used to laugh as they were as much use as an ashtray on a motorbike.
Sorry, but the moment the interviews started, I could tell they were actors. Also, the angles that the video of the truck were taken just looked too 'neat'. My guess is that it was a viral ad for Nissan.