Write a YouTube video script.

Topic: {{topic}}
Channel niche: {{niche}}
Target length: {{minutes}} minutes
Audience: {{audience}}

Structure:
- Hook (first 15 seconds) — a question, claim, or scene that makes them stay
- Promise (what they'll learn)
- 3-5 main sections, each with a mini-hook to next
- Pattern interrupts every 60-90 seconds (visual cue, story, callback)
- Recap
- CTA (sub / next video / link)

Write for the ear, not the page. Short sentences. Specific examples.