What is this site? What is it for?

The Youtube2mp3.net service makes it possible to convert videos and download mp3 files from YouTube.

Youtube2mp3.net is a free tool for converting YouTube videos to mp3 files.
By simply cutting and pasting a YouTube page, you can convert the video content on that page to an mp3 file.

It is so easy to do, and only takes a few minutes.
And when this is done, you can download the mp3 audio file to your computer.
Where do I copy the YouTube URL?
The screenshot shows the one place where you can copy the YouTube URL address.

An e-mail address is optional.
Your e-mail address will be used only to send the link for downloading the mp3 file.
After you have entered an URL address and clicked on "Convert", the video will be converted to mp3 format.