youtube is FLOODED with free fitness content, I mean, you could workout for five years and never see the same video twice its all evergreen - crunches from five years ago are just as good today everyone I know who worked as a personal trainer has moved out of the industry endless free resources out there and then the content connected to devices like Peloton etc not sure how you can make a buck in this business want…
I know because I've done this many times in many contexts, with everything from fitness apps to programming courses to buying the latest fiction books. With all of these, there are multiple lifetimes' of free, good content out there, but good luck mining the nuggets out from the thick layer of slop.