lAtomos-afk/VideoDownloader ? reverse-engineered prompt

Build me a simple desktop app for downloading videos and audio from places like YouTube, Facebook, TikTok, and similar sites.

I want a clean modern interface with both dark mode and light mode, and it should feel easy to use for someone who just pastes a link, picks a format, and downloads. Let me choose audio or video, with audio options like MP3, FLAC, WAV, OGG, and M4A, and video options like MP4 and MKV. For audio, let me pick quality up to 320 kbps, and for video, let me choose the best available resolution.

It should also keep a history of past downloads so I can quickly find what I grabbed before. Make it work as a Python and Tkinter desktop app, and if you need to look up current docs online for any download library or platform changes, feel free to do that.