My DD has a private hitting instructor who does not use video. I tape her at home and look at slo-mo to figure out what issues she is having and to show her what she is doing, which I find extremely helpful. Hitting coach does not use and therefore I feel does not have a true understanding of what she need to work on. I even offered to film during lesson for her, but she wasn't interested. In this day and age, I can't imagine a coach NOT using video. What are your thoughts?