Unrud/video-downloader ? reverse-engineered prompt

Build me a simple desktop app for Linux that lets people paste a video link and download it easily.

It should work with YouTube and other sites that yt dlp supports, and it should feel friendly for non technical users. I want the app to handle single videos and full playlists, let people choose quality, and automatically pick a good format when they do not want to think about it. It should also support converting downloads to MP3, and it should be able to deal with private or password protected videos when the user provides the needed access.

Make the interface clean and easy to use, with basic progress and status feedback, and include a few screenshots style screens like a normal desktop utility. If you need to check current docs or best practices for yt dlp or the desktop toolkit, look them up online.