Not an answer but your question has me curious now. I'm not old but I've got a particular worldview that could use an update. Why video? Aside from entertainmen

Not an answer but your question has me curious now. I'm not old but I've got a particular worldview that could use an update. Why video? Aside from entertainment or live collaboration, I've never found video compelling for productivity. Reliable machinery always has a shop manual, diagrams and prints. Programming languages have tomes of documentation, computing infrastructure has man pages and volumes of commentary, scholarship and trouble shooting have been committed to characters. Aside from the point and grunt visuals, solid presentations (viewed after the fact when the value of real time interaction is gone) work fine as text. If you're dyslexic, I get it but TTS systems are extremely solid these days. What is the point?