krish17kp/Auto-generate-Promo-videos — reverse-engineered prompt

I want this turned into a working app that takes a long video and automatically creates a short promo video from the best parts.

Please make the whole flow actually work end to end, from uploading or selecting a video, to detecting scene changes, pulling useful frames, scoring the most visually interesting segments, trimming them, and stitching them into a clean final promo clip. The result should feel like something I could use for marketing or social media, not just a rough demo.

If the current repo is partly a web app and partly a script, that is fine, just straighten it out into one clear experience and make sure it runs locally without confusion. I would also like basic output handling, so the finished promo is saved properly and easy to find. If possible, show progress and surface helpful errors, especially around video processing and FFmpeg setup.

Please keep the implementation practical and lightweight, and add a simple README with exact run steps. If anything in the repo is incomplete or mismatched, fix it in the most sensible way. Look up current docs online if you need to.