You shouldn't put out a DVD or book yet. Wait a few years. Work on it further, see if you can take it farther. Chances are if this came out randomly in your mind, you can take it a lot further. Either that or contact a site such as Ellusionist, Theory 11, Penguin Magic, or some other magic site. (Contact all of them and find out which one will give you the best business deal.) I recommend you work on it for a while, maybe even a few years. It may seem unnecessary, but it will come in handy. If you aren't over 21, no one will take you seriously. It's like a 12 year old teaching someone who is 32 something. While it may be done depending how long you've been in the art, you wont be taken seriously and I'm sure you can work on it.
-Doug