y2mp3 is a free, open source software to download FREE clips from youtube and convert it to video (mp4, mpg, wmv) and audio (wav, flac, m4a, wma, mp3, ogg, acc) formats.
With the app you can download single clip or whole playlist.
The app is not tracking your actions in any way and the communication is only between your computer and youtube's servers.
The application is allowing to download only PUBLIC clips and the usage of the app is only on your responsibility.
The app has minimal and clean UI to give simple and flexible experience but yet, powerful functionality.