Hi Lexje, the ibbs.tv website is by Lee Jae Bok, it does need to have a paid for subscription but is very good. That said, in my humble opinion, having bought dvd's, books, and used websites etc, the only thing i have found to really improve my technique and footwork is to have professional coaching, it is the only way you can find out the flaws in your technique as they can watch you play each shot.
