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I don't see the utility in this as a vital educational tool. The danger with trying to use video demonstrations is the same as analogies, that is it can put students into a form of tunnel vision where they fail to abstract concepts. The risk is that students will latch onto simple demonstrations of said concepts that are in themselves flawed in a general setting.
Example: Try demonstrating to a student what dividing a number by two means in a visual realm. A lot of teachers will use the apple example, where given an apple, dividing something by two would be like chopping an apple in half. That analogy fails in the general realm because it's not applicable to dividing by fractions.
Also, I find sound, and video a distraction from reading. If you are supposed to be reading a math book that talks about certain concepts, having a clickable video on the page will mean more often than not, that the student is going to be paying more attention to the video examples than what is being said in the text. Because we are most likely dealing with byte size limits, videos and audio portions are going to fall short of what text can say.
Not only that, but many novels are either not transformable to an animated story board, or will suffer from having a poorly adapted storyboard. Les Miserables has been adapted to stage, movie, and musical many times and none of them will be as complete as it's original text. To suggest that the unabridged Les Miserables is unnecessary to read and that an adapted storybook is a suitable replacement, is the basic equivalent to vandalism.
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