I'm not sure what exactly that is, but a video DDS online, for prescreened DDFers, would be great for those who can't make it to a regular DDS.
Its basically "You pay to view" --Yep I agree - there are services that will allow you to A: Live stream and even charge to be able to "enter" and than save the live stream and sell it.
B: You can create what's essentially in your seminars in a nice edited video...possibly with just even a voice over and graphics --similar to the new fad of white board cartoon ads --and sell it.
I doubt (or at least hope people wouldn't) pirate the video.