Corremn, there is already a 7drl named The Rougelike (and also POWDER which is somewhat rouge like).
As for the original question, IMO text has many advantages over video as a way to present information. Easier to create (I suppose, it would be easier with the right tools, but I don't know if such tools exist), takes less space, takes less time to learn the relevant information (because you can skip the irrelevant parts or just read quickly), searchable. I am much more likely to read text than to watch a video. Unless the video is very artistic or shows some (relevant) animations, hard to do that with text.