GhostPeony/clip-finder ? reverse-engineered prompt

Build me a web app that lets me search YouTube videos by meaning, not just exact words.

I want to paste in a channel, playlist, or single video and have it index the transcript, then let me search in plain English and get back the most relevant clips with timestamps I can click to jump straight to that moment in the video. It should have a simple library view, show recent searches, let me download transcripts, and skip videos that were already indexed so it does not waste time.

Keep it self hosted and easy to run locally by default, with a setup that uses my own Gemini API key. If possible, make it flexible enough to support a hosted multi user mode later with login, quotas, and stored keys, but local mode should work without any extra services. A clean React frontend and Python backend is fine. If you need current docs for anything, look them up online.