What about a larger truck behind the Van? The ladder frame and side walls are going to quickly accordion from a heavy rear impact.
None of the vehicles in this class do very well in big crashes, really.
The videos are encouraging. Early in the decision process, I had some idle thoughts of converting a Mitisubisho Fuso, Isuzu/GMC or Hino type cab-over. But the thought of a crash in those (my face and body so close to the impact area, no crush zone) was a factor in not pursuing them further.
I feel that an important and undervalued aspect of building out vans. I'm planning on having a partition between me and the contents in the back.