And then for the video summaries, probably some people will do it. But i would literally never, it's crazy. I enjoy the videos because of their creativity, their visuals are usually important, the voice is soothing and interesting, and the nuances of the content are all crafted by a human with your interests in mind. To replace that with some auto closed caption summarizing gpt shit would be ridiculous. I strongly doubt that this will gain significant traction anywhere near where sponsorblock currently is. If someone would rather see a paragraph summary then they probably wouldn't watch much of the video anyway.
This strikes me as scared and somewhat defeatist. As media changes, audiences and what they demand changes. We don't listen to radio periodicals anymore because we have better ways to get that information across. I don't see anything other than maybe augmented reality that could possibly usurp the throne that video currently sits upon. Certainly not some llm generated summary crap