We are pleased you wish to create a course at Great Photography Courses. Our mission is to sell eCourses, which we describe as eBooks with videos, or a courses that consist entirely of all video. Many photographers might be missing some markets by just offering eBooks.
Having taught online for 10 years, I have heard many times from students who tell me they learn better in courses that include text with video to emphasize points. I personally began adding videos years ago to my courses and it was very effective. The amount of testimonials students sent when evaluating my courses jumped dramatically.