This is a tentative bid, as I need to find out more about what you want, and then confirm it with the two people at this end. I am also not sure about the price or the time frame. My son, Rouan, is a videographer, and my niece, Chantelle, is a personal trainer. Rouan is interested in the project but I have not asked Chantelle yet. Would you be able to share with me several of the reference videos? Also, would you be providing a written list of the actions required and would they need to be filmed in a particular order? I expect Chantelle would have more questions, but perhaps you'd be able to answer these questions at this stage.
Rouan has worked as a videographer for several years, some of the time in his father's company and sometimes independently. I can send you a link to one of the videos for which he did the filming, as it is in the public domain. He majored in media studies in his degree and works as a photographer, videographer and website developer. He has carried out some successful projects via my Freelancer account, including filming a recent series of interviews for an Australian company.