Here is another video explaining pedaling technique. As the author answered someone, turns out it's only for clipped pedals.
Those same techniques were developed for straps and clips but also work with clipless and can even work with a well designed platform. All evidence (there are studies) indicate that even pro's do not pedal like that in anything but sprints and such. For most of the ride they pedal the same way the rest of us do, they just do so much faster...