tom, im not sure if ive come across dvds that actually focus only on misdirection, but ill tell you what i think. If you buy a dvd, that either has 1 or more tricks on it, they WILL and should teach you the misdirection needed. This misdirection teaching can not only be used for that one trick, but can be applied to so much more tricks that you can learn from. Keep working on the misdirection for a few weeks and you will eventually come to a point where misdirection is super easy for you. Hope this helps you out, if not, oh well. haha
-Perceptiv3CardMagic