I run in vibrams too, and I also find that I use a midfoot strike. I do have a forefoot strike when I run barefoot, as in the video, but I've never really been able to make it work for me. I thought about it a bit, and I realised that running shoes are almost universally designed to support a heel strike and a forefoot push, until now that is, with the advent of vibrams and other 'barefoot' shoes.
Which honestly, I think is a bit of a fad. I can't believe that all the athletes and engineers who designed all the running shoes to date were wrong about running until vibram showed us the light. I do run in mine, but like the OP, I can't see myself running any great distances in them. Maybe 10K but not likely ever any more than that. I think that in order to really pile up the miles I need to use a good shoe with a fair amount of support and some good cushioning.
So my question for you is, do you think there's any sound anatomical reason that running barefoot, or in 'barefoot' shoes, should be better or safer than running in modern running shoes?