With respect to the first vid in your last post:
"The scientists set up a high speed camera...at the 15km mark of the race, and captured most of the runners coming through. In total, they were able to observe the foot strike of 248 men and 35 women, and characterize them...
...the finding is the following:
* The vast majority (75%) of the elite runners land on the heel"
http://www.sportsscientists.com/2008/04/running-technique-footstrike.htmlIn short, as many people in the barefooting movement are smug morons as in Paleo or Crossfit. Not to denigrate barefoot running by comparing it to the latter two, and I believe in barefoot running in principle. But the point stands that it's a movement and therefore many of its most enthusiastic supporters are just zealots.