If you HAD to buy one of these, I would probably go with Jason England's Foundations. Jason has always been amazing with covering all of the little details. However, the best video project I have come across regarding gambling and cheating would be Steve Forte's Gambling Protection Series. When I think gambling, I always think Steve Forte.
Link to Steve Forte's GPS:
http://www.gamblingincorporated.com/product.php?productid=16281
*It's pricy, but it would be well worth it.
I would also recommend getting a copy of The Expert at the Card Table as well, if you don't own it already.