What does codex-product-demo-video-skill do?
Create polished product, app, SaaS, mobile, or brand demo videos from assets, screen recordings, screenshots, Figma exports, narration, music, and motion direction. Use when the user asks to create, refine, render, synchronize, or audio-mix a real video artifact such as a product promo, app walkthrough, launch video, feature trailer, social video, or narrated demo.