Most of the instructional WCS content available out there are the video demonstrations. And I believe that is bad.
You, of course, want to have the video demonstrations.
But it's a bad medium to present a coherent overview of the topic
you can't search the videos
and you can't find relevant videos based on the content with something like web-search, so they are not very discoverable
you can't link to an explanation of related concept as you mention it in the video
it's hard to lay out an overall structure of a topic in a video, as it doesn't afford for non-linear exploration
It also doesn't quite afford for the same depth of discussion of conceptual material, compared to a written piece
What I think you want instead is a hypermedia piece: a text scaffolding that creates a broad structure and goes deep, but is also liberally peppered with video demonstrations and other visual aids
See wcs/concept/lead projection for one of my attempts at creating such a guide.