You read text at about 250 words/minute. People giving talks speak no faster than 100 words/minute. So a one hour video contains much less information than a book it takes you one hour to read. Another way to look at it is that the script for a one hour video is about 24 pages of double-spaced 12 point font, and the information content is less than that suggests, because a good talk will follow the rule that first you tell them what you are going to tell them, then you tell them, then you tell them what you told them. Video is a very inefficient way to convey information, and it doesn't improve recall.
Thom Hogan's books are excellent - accurate, comprehensive and well set out, and you get free updates to the text when there are important firmware changes. Text is legible on my iPhone 16e and the search function is good.