After watching the video, I think what he says in it is fair.
It is perfectly reasonable to want to have more viewers of the videos. Not only that gives more profit, but also that's the whole point of making educational videos in the first place. And if making more 'click-baity' titles leads to that, it is okay, provided you do not go over the boundary what is considered dishonest and would actively mislead. Obviously the exact boundary is somewhat fuzzy, but pushing all the way till that boundary seems reasonable.
The same logic can be used to justify all kinds of awful stuff though. From putting a scantily dressed woman in the thumbnail to just straight up lying in the video to blow people's minds. You have to draw the line somewhere because you just don't want to do crappy things, unless you're a narcissist and/or sociopath.