Nerd, that is absolutely true. One of my father-in-law's favorite saying before he passed was "50% of ALL doctors graduated in the bottom half of the class." I would say that the same percentage applies in this case as to below average.
In addition, the point of posting the video is, would you want to be a defendant with one of these people on the jury? I totally understand why this guy does these. He has published 8 books as a result of the interviews on different subjects. Getting people to sign a petition to ban di-hydrogen oxide from our food supply is one of the subjects. It's scary how many people signed it.