For me it's the opposite: for example, I had watched countless videos on "disruption" but did not fully grasp it until I read The Innovator's Dilemma. The same holds true for theory of constraints vs reading The Goal, Robert Cialdini's works on influence, Richard Dawkin's views etc. In all cases, I thought I understood the material before reading the original source, and in every time the books blew me away.
Perhaps there is a dimension about how rigorous the thinking is behind the book. I struggle to imagine a YouTube video that could effectively and convincingly unpack ideas from The Intelligent Investor, The Sovereign Individual, Sapiens, etc. Other topics like "How to get rich with x" or pop-sci covered by the likes of Kurzgesagt are simplistic enough for a video essay, but those are seldom worth consuming regardless of medium.
I think you're hitting at the dichotomy of knowing vs grokking. A lot of powerful concepts have high level summaries that can trick the audience into thinking that's all there is to it. Chris Voss's excellent "Never Split the Difference" comes to mind. A lot of his negotiating strategy can be boiled down to "develop a mutual and deep empathy with your negotiating partner". On some level this makes intuitive sense; people who empathize with you will help you solve your problems, and empathizing with other will help you tailor your solutions to their concerns. But when you sit down to pull this off, you run into two major problems. What is the strategy for doing this? Some phrases tend to antagonize people, while others help build rapport. There are often emotional stages that relationships have to go through, so you need to behave appropriately at each stage, but also you need to move the relationship to the point that is beneficial for you. The second major hurdle is actually implementing these strategies. Even with the head knowledge, when the pressure to perform is on, you may not behave appropriately.
Put another way: it can be easy to gain an understanding of a particular goal, but very difficult to develop a deep understanding of the systems that allow you to achieve that goal.
Perhaps there is a dimension about how rigorous the thinking is behind the book. I struggle to imagine a YouTube video that could effectively and convincingly unpack ideas from The Intelligent Investor, The Sovereign Individual, Sapiens, etc. Other topics like "How to get rich with x" or pop-sci covered by the likes of Kurzgesagt are simplistic enough for a video essay, but those are seldom worth consuming regardless of medium.