“the hook here was what if you could stop your doom scrolling addiction by doing 20 push-ups and with a hook you want to make it as clear as possible such that even a 5-year-old can understand it you should make sure that there is a curiosity gap”

Hook needs a curiosity gap even a 5-year-old immediately understands

The push-ups curiosity gap — what do push-ups have to do with stopping doom scrolling — made viewers stop and watch. A clear, novel hook is the most important element of a viral validation video, because a bad hook makes it impossible to know whether the idea or the execution failed.