It all begins with the intro!
The Intro just have a one purpose for the video, and it’s a strong one: To cue all the strong points of the video in a coherent flow which gives the viewer a good reason to watch it!
Hooks can be of various types - examples, incidents, Coming up section, Questions, etc.
But what worked the best for this channel was : A bold statement quickly followed by a resource validating it.
https://youtu.be/nDYoQTCvhv8?si=U-6m7xmo3uCKHfgP

https://youtu.be/mFGKdbnd0mw?si=14N08TnToGNdHsp0

https://youtu.be/7o7MaIMAhTY?si=qJ-5SaCVddaghUt-

Not just to grab the viewer’s attention hooks also work as a promising method to let viewers know that video contains the stuff for which they clicked it for (The idea, Thumbnail and Title)