Q: How do I test if a video hook works before wasting hours on the full edit?

Q: How do I test if a video hook works before wasting hours on the full edit?

Short answer: post the hook as a standalone test first.

Longer answer:
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Film only the first 3 seconds — the hook frame and line.
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Drop it in your stories or a throwaway slot and watch the 2-second hold rate.
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Under 70% holding past 2 sec? The hook's broken; don't build on it.
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Read the first 3 comments — confusion means your promise wasn't clear.
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Reshoot the hook 3 different ways, pick the holder, THEN edit the full piece.

Verdict: editors waste days polishing videos doomed by a bad first frame. Validate the entrance before you build the house — a hook that doesn't hold can't be saved in the edit.