An interesting perspective. I personally didn't enjoy lectures in college when it came to technical classes (engineering, math, physics) as I had trouble keeping up. Videos help solve that though as you can go at your own pace...pause and rewind. I'm sure it will be a lot faster and reach more people faster with videos. There are so few in the APL/J world. The few ones that exist are very popular though.
Rest assured that I haven't given up on the textbook / tutorial approach just yet, but I might have to "invent" my own publication technology to get the "book" that I want.
Would it be hard to just create a Dyalog-APL notebook (I recall Dyalog added support for that recently) and export as PDF?
I find Jupyter notebooks in Python and Wolfram's Mathematica to be nearly perfect for explaining complicated content where you can easily format text, images, and inline code snippets.
