Hi Paul,
One thing I would advise is try and get some hard numbers on conversions through PPC testing or something similar.
Potential partners are going to want to know how well a product converts so if you can work that out and give them a potential $/click it will make it easier for them to say yes, and also give you more credibility as you'll have done your "homework".
Another thing that might be worth considering is letting your JV partners have the option of looking over the course. If sending out actual DVD packages is too cost prohibitive you could always try and create digital samples of parts of the DVDs and upload them. That way partners can at least get a taste of what they are promoting so that they can make a better decision about how it will fit with their readers.
I'm assuming this is quite a high ticket item being a physical DVD package - you could also think about making a smaller intro product e.g an ebook that you could sell on clickbank and then offer customers a discount on the big DVD package. Clickbank has a huge affiliate base so this could help drive some initial traffic and get people into your funnel.
Hope this helps!
Richard