HKUDS/ViMax ? reverse-engineered prompt

Build me an AI video creation app like ViMax. I want to type a rough idea, a script, or a longer story, then have the system turn it into a complete video plan with story, scenes, characters, visual prompts, and generated clips.

Make it feel like an all in one director, screenwriter, producer, and video generator. It should support idea to video, script to video, novel to video, and a cameo mode where I can upload a photo of myself or a pet and use it in a story. Keep the interface simple, with a place to enter the concept or script, upload an image when needed, start generation, and see progress as each step is created.

Please build this in Python using the existing project structure, make the main workflows runnable, add clear setup instructions, and include sensible demo examples. If any model keys or video services are needed, leave clear placeholders and explain where to put them. Look up current docs online if needed.