Write a 20-25 minute YouTube challenge video script about {{topic}} for {{target_audience}} in a {{tone}} tone. The goal is {{goal}}. Include: a hook (first 30 seconds), introduction, 4-6 main content segments with on-screen titles and B-roll notes, a climax, conclusion with CTA, and YouTube optimization (5 titles, description template, 15 tags, thumbnail concept). Every segment must provide actionable insights. Keep the script between 2500-3500 words. Paste any relevant background information after these instructions before running.