I just ordered a video called Tactical Baton by Kelly Worden, who has a good reputation as a tactical knife and martial arts trainer. I haven't received it yet, so I have no personal comment. It got a very good review at
http://www.altinet.net/~karate/kwtb1.htm
It is a two tape set for $59.95. I ordered mine from Paladin Press. It is also available at gunaccessories.com
I have had excellent experience with both vendors.