Idea: Tap into fear of missing out or being left behind.
A first person opener that presents a useful fact as something that was withheld from the speaker rather than as something the viewer got wrong. Spoken and usually also on screen as text, in the shapes the page gives: "Why did no one tell me...", "No one told me you could...", "I wish I'd known this years ago".
Missing out normally gets written as an accusation, and an accusation makes the viewer defend themselves before they have heard anything. These lines put the ignorance on the creator instead. That removes the charge and leaves only the feeling behind it, which is that useful information existed, was circulating, and did not reach the person speaking. The viewer's next thought is not about the creator, it is a check on whether it reached them either, and that check cannot be completed without watching.
The examples split into two polarities that feel identical from the inside. One is a grievance about something already paid for, as in college turning out to be useless, which says you may have wasted something. The other is a discovery about something being unexpectedly cheap, as in building muscle much faster than you thought, which says you may be leaving something on the table. Sunk cost on one side, unclaimed upside on the other, and both resolve into the same audit of the viewer's own position.
One thing the examples on this page make clear: every one of them is first person and past tense. Nobody is told they are behind; the speaker is the one who was. That is exactly the part that gets lost in adaptation, because the natural rewrite is second person ("nobody told you that..."), and second person converts a shared grievance into a diagnosis and hands the viewer something to argue with. The third example also shows the hook carrying its own call to action inside the line, with a save prompt welded straight onto the claim rather than held back for the end.
Two versions of the same move.
The grievance: "Why did no one tell me [thing the viewer has already committed to] would [bad outcome]?"
The discovery: "No one told me you could [desirable result] THIS [fast, cheap, easily]."