there are two. The first one that was made is called snap. It's from 03, so you'll get to see some classic riding from some classic riders. It also has some really great bonus sections. The style of instruction isn't as detailed as "the book" but I'd still recommend it becuase of the extras, and this video may still give you something to think about (as far as figuring out a trick goes).
The other instructional out there is the book series. There are three dvds--beginner, intermediate, and advanced. This dvd series isn't quite as entertaining, but it wasn't meant to be a freeriding dvd, either. the style of instruction is much more detailed and it will definitely give you a lot to think about, as far as troubleshooting and things like that are concerned. one nice thing is the book dvds have aaron reed's issue 2 video section as a bonus reel.
anyway, I would really recommend both DVDs, but if you're really looking for in depth instruction and nothing else, I'd point you toward the book.