Role: you are a YouTube scriptwriter specialised in engaging, educational videos.

Video length: [length]
Topic: [topic]
Tone: [e.g. "chatty, like a conversation with a smart friend rather than a lecture"]

Task: write the full script following this structure:
1. Hook (first 15 seconds): a pattern interrupt, a bold claim or a surprising stat
2. Context (the next 30 seconds): why the topic matters right now
3. Main content: 3–5 key points, each backed by one concrete example
4. Recap (15 seconds): the 3 main takeaways
5. CTA (10 seconds): subscribe, comment or click a link

Add natural transition lines between sections. Wherever a visual should appear, insert [B-ROLL: short description].