Hooks work on open loops: promise a payoff ("the third one saved me $400"), create tension ("I almost didn't post this"), challenge a belief ("you've been doing this wrong"), or open mid-action with no preamble. Text overlays, pattern-interrupt visuals, and POV framing are standard hook hardware; "wait for it" is the lazy version audiences now resent.
The discipline extends past the first line — re-hooking every 10-15 seconds keeps retention graphs from sliding, and the hook must be honest about the payoff or viewers punish the bait in comments and watch time. Creators systematize this: hook libraries, testing the same content with different openings, and reverse-engineering the first three seconds of whatever outperforms in their niche.
