What you need
- Youtube link of your choice
- http://peggo.tv/ for MP3
- http://www.youtubeinmp4.com/ for MP4 amd MP3
For Android you have to download and install APK from
There are few websites that provide such services, as far as this tutorial goes this is one of the better option.
Disclaimer: This tutorial shall not be responsible for any individual action based on the pertaining subject. This is only for educational purposes.