There are many ways you could just download the mp3 of a video. You could use IDM, or Down Them All Firefox Plugin etc. But I found a way to download the mp3 without using any third party tool or plugin.I found a website called listentoyoutube. Just go to it. On the homepage, you will find a form where you can enter the URL of the video you want to download . Find a Youtube video and copy the URL link into it.
- It will check the link taking some time
- Click on the highlighted area .
- Now click on the “Download mp3” button
You can also visit TheYouMp3 for the same.