Well I guess I'm either an expert or just damn lucky, because I have ridden my FZ up onto a rental truck many times. But unlike many of the riders on the video, I always wear full gear when I do it.
Whether it's a pick up or anything else, whenever you have an opportunity to lessen the angle of the ramp the better it is. The last clip of the video, looks like the truck could have backed up to the edge of the driveway from the street, or even to the lawn, which appears to be a couple of feet above the driveway, assuming that they can get the truck at a 90 degree angle in the driveway.
I guess the most important thing to be successful at this, is keep your forward momentum going. Once you stall or stop, there is no place to put your foot down so down you go. If you ride into a box truck, remember to duck your head!