I assume that you are talking about the Kosmos videos. He does not really get into what is in each rub, but I wouldn't expect him to. He does discuss to some degree what each rub is good for, the combinations he uses and what he mixes with sauces and injections.
I would say that he shows you a solid flavor profile that you can use as is or as a starting point for you own recipe. There are always a couple of things I see in a class or video that I know immediately that I am going to try. It might be a presentation, a trimming technique, or some flavor element, but there is always something.
The videos have a pretty established resale market, so you can watch and resell and only be out shipping cost. While physical classes are better, it is pretty tough to resell them.