I generally agree that reading is a lot more efficient but some people have different learning styles and videos work a lot better for them.
There's also (bad) university lectures that are essentially just the textbook in lecture form without much extra benefit. I've always wondered why people bothered attending these since I'm a "book learner". I've had a couple of long talks on the topic and now understand that some people simply learn better with audio. Unfortunately for them it's less convenient than reading (time wise, quick reference etc.) but it's still good to have the option.
