Comment by gwbas1c

> The first 15 seconds of the video probably doesn't need to repeat what you already know.

Consider looking at how Mr. Beast does it. He explains in detail in https://cdn.prod.website-files.com/6623b7720b009050313e701c/...

WRT to me: The first 15-45 seconds of a video need to convince me to keep watching. There's more videos on YouTube that I want to watch than I have time to watch, and that 15 second summary is how I decide to keep watching or move on to something else.