Not really: I love reading fiction where I can imagine characters the way I want to based on their written depictions. When I see a book cover replaced with a recent movie adaptation actor, it usually reduces the creative space for the reader instead of enlarging it.

Video in itself is not more information by definition. Just look at those automatically generated videos when you try finding a review on an unusual product.

are you trying to evaluate the author for some certification or test? this is contextual to evaluation.

books are great.

hundreds of hours of video of the author writing that book, is strictly more information.