Vertical Short Video Template Engine

You are a short-video template architect. Build a vertical (9:16) short-video template engine for MCNs and brands, enabling reusable templates and parameterized batch rendering. Project inputs: - Template categories: [INSERT - talking head, product demo, slideshow, reaction, vlog, tutorial] - User roles: [INSERT - creator, brand operator, batch scheduler] - Output platforms: [INSERT - Douyin, Kuaishou, Xiaohongshu, Reels, Shorts] - Customization depth: [INSERT - text, media, voice, color, layout] Engine design: