lamjesus/nan-video-pipeline ? reverse-engineered prompt

Build me a TypeScript app that turns a topic into a short narrated vertical video, from script all the way to a finished MP4. I want the flow to be topic to storyboard, then pick matching images, generate Spanish voice narration, create subtitles, compose the video, and render a 9:16 output. Please make it work with the open models in the NaN cluster, using one central storyboard file that each step reads and updates. It should also have a simple way to run the whole thing at once or run each stage separately, plus a quick check command that verifies the environment and model access. Keep the project easy to edit by hand, with storyboards in YAML and a local preview I can open before the final render. If you need to look up current docs online, go ahead.