Interesting, my conclusion, it depends. That particular one has back foot just barely in the frame at critical moment.<p>Watching Troy Grady's closeups of leading guitar players picking hands from a few inches away didn't do much for me, but watching lots of telemark skiers vids helped pinpoint variables like pole length and pole plant reach that I would not have thought of.<p>So, like learning piano or violin or sports/kinematic skills, read and watch vids a little and practice a lot.