For some things there is a lot of nuance lost in just writing. The unknowm unknowns.

There has been a lot of times where I am showing someone new to my field something and they stop me before I get to what I thought was the "educational" point and ask what I just did.

Video can portray that pretty well because the information is there for you to see, with a schematic or write-up if the author didn't put it there the information isn't there.