Well that's the problem, any reasonable looking video of scripted drama is going to cost a fair bit more than the production cost of a musical piece or certainly a book.
A book involves a writer and an editor. Music involves a composer and performers. TV shows involve writers, other writers who essentially serve as editors, music composers and performers, plus a whole lot of other necessary people - actors, costume designers, set designers, SFX people, makeup, hair, lighting, etc.
Just the number of people alone tells you why the costs get driven up. Everyone needs to be paid, and if they're good at their jobs, they need to be paid well. If they're not good at their jobs, why should I bother with their stuff? If one element is not up to par, everything suffers.