-Have you done any market research to see what similar training videos sell for?
-Is this a small niche training video, or something with wide audience?
-Is this a single entity Academy or a chain of many academies?
-Just my opinion, but no way I involve a lawyer until I knew there was significant profit potential.
-In business you gotta keep things simple, especially if you don't have much experience on your own. Keep things simple for you and absolutely you gotta keep things simple for your potential buyer. You will quickly scare people away with complicated contracts, discussion of lawyers, etc. Put yourself in the shoes of the buyer.
-If you have a decent product it might be better to find a distributor/reseller. It would take a huge amount of time to develop a list of potential buyers and get any traction in winning them over. Either that and jump in with the mindset of learning a lot and profiting (initially) only a little.