A first-second hook is the object: frame one, the first burned line, the first sound. Hook rate is the score. A cold open is the usual shape — already in the action, no intro. A hook pack is the production unit that makes those testable: N openings, one body, one brief. Swap the open without reshooting the proof. The metric then isolates the thing you changed.
Five smiles with a different adjective are not a pack. Change the picture: a pack shot with a readable claim, a product already doing the thing, a mistake in progress, a number on screen. Burn the line into frame one so mute autoplay still has a reason to stay. Versely's version plans distinct opening lines for one brand and renders each as its own vertical clip with the line in the frame; the hooks library keeps reaction openers you can drop in front of footage you already have.
Generation makes packs cheap to run and cheap to fake. If the body also changed, you no longer know whether the hook moved the number. If every open is the same shot restyled, hook rate will not move. Watch the first second on mute at phone size, then spend behind the winner — as a Spark Ad, a dark post, or an organic row — rather than as a pile of near-duplicates.
In practice
- Lock the body. Change only the opening frame, the first burned line, and the first sound.
- Name the payoff in picture or type in second one. A greeting is not a pack member.
- Retire losers. Shipping all five opens as if they were one idea is how a catalogue starts to look like a farm.
The mistake to avoid
Calling a batch of the same clip with different caption colours a hook pack. The variable has to be the opening, or you are not measuring hook rate.
Go deeper
A hook pack is six openings, one brief
create_hook_pack plans six distinct openings from one brand brief and charges once. Six prompts is not a pack.
Where you will run into it
- Add a Hook to Your Video — The first second decides if anyone keeps watching.
- Add Reaction Clips to a Video — Genuine reaction footage, dropped into your cut.
- AI Ad Generator — One offer, several openings, tested the same week.
- AI UGC Video Generator — UGC ads at the speed and price of a prompt.
- AI Reel Maker — Hook, beats, captions, posted.
Related terms
First-second hook
First-second hook meaning: the opening beat that stops the thumb (frame one plus the first line), graded by hook rate.
Hook rate
Hook rate meaning: the share of people shown a video who are still watching a few seconds in. It grades the opening, not the body.
Cold open
A cold open starts on the action — no logo, no greeting, no 'hey guys' — so the first frame is already the reason to stay.
Retention curve
Retention curve meaning: how many starters are still watching at each second. Watch time is the area under that curve.
Creative fatigue
Creative fatigue meaning: performance decay because the audience has seen the same piece too often, not because the piece changed.
The all-in-one AI studio for creators. 60+ models for video, image, voice, music and lipsync, in your browser or on your phone.
Free on the web and on iPhone, one account.