cyberh4ck3r/yt-downloader ? reverse-engineered prompt

Build me a simple YouTube downloader web app that lets people paste a YouTube link, choose whether they want audio or video, pick a format or quality, then convert it and download the file.

I want it to feel clean and easy to use, with a modern landing page and a clear input flow. Please include a nice centered form, helpful labels, a loading state while the conversion is happening, and a download button once it is ready. If there are errors, show friendly messages so people know what went wrong.

Use the existing React and TypeScript setup, and make the UI look polished with Tailwind. Keep it responsive so it works well on mobile too. If you need to check current docs or API details while building it, go ahead and look them up online. Also make sure the final result matches the screenshot style closely, with a simple and focused experience.