I would suggest finding a video called "OCD: the war inside"
I watched this film in my Dynamics of Human Behaviour class and found it to be very informative. I don't know if it'll be available in movie stores, but you might try your local Library. If not, your local Collage/University library is very likely to carry it.

Here's a brief description of the movie:

<A target="_blank" HREF=http://www.suite101.com/article.cfm/14522/98195>http://www.suite101.com/article.cfm/14522/98195</A>