<shrugs> I have started to use video as a teaching tool with some of my more motivated students. Right after they promote to a new rank, I give them a DVD with some kata, drills, and mental concepts they will learn next in class. They are supposed to watch the video a few times on their own. I find the ones that have done so are considerably ahead of the ones that haven't as would be expected, and I think it beneficial and will continue to experiment and push the envelope in this way. Of course, this is not a 'distance learning' thing - the DVD media works hand in hand with my in-class instruction. Now do I think someone could use one of my videos to teach them something useful without the benefit of my guidance? Well, to an extent. I give a lot more detail on some topics I filmed than others. For example, I filmed a 1 hour video just entirely on stances and movement within them. A self-aware student with the use of mirrors and his own video camera can accomplish a lot watching my video over and over again while trying to follow the directions within it. Of course, most people aren't that patient or self-aware and wouldn't be capable of learning this way - and in the end, we still boil down to the fact that it's a lot easier and better to just receive tuition in person to begin with.