I generally agree with this comment. I think the things I'd highlight are: 1) Retention is not always needed. If my primary goal is to gain cursory knowledge

I generally agree with this comment. I think the things I'd highlight are: 1) Retention is not always needed. If my primary goal is to gain cursory knowledge of the top 5 frontend frameworks so I can decide which one I'll sink the necessary time into so I can retain/understand it, the short format can be fine (and highly desirable). I'll follow it up with a proper deep dive. 2) Understanding of core subjects may have already been established by decades of experience, and the video is just communicating what is possible, or the delta between Tech A and Tech B. I think it boils down to: each format has a time and a place. I do think that trying to learn the depths of a completely new subject by watching 5 minute hyper-distilled overviews is not going to go well. But that's not why I find these videos useful, personally.