I did not direct your attention to the video to be silly or because I do not understand basic physics, the reason was to point out that there are many factors that come into play when being cautious about being in the bedroom area when camper is off the truck.
I believe that on my camper the front jacks are solid , however the camper is old and I don't think I would want to trust them. I also point out that when the camper is on its jacks the wind or other conditions can play a part in that trust.
I find it counter productive to use words like "silly" and to infer that no one is smart enough to comprehend the physics of a camper. The camper did tip over, so you might just look at the video anyway. It didn't just fall down.