How to make a website like this?

Can anybody in this group tell me how to make a website like this http://lookingforlyrics.com/

that website shows youtube videos and lets users download them as mp3. it looks like youtube search engine take the videos from youtube and convert them to mp3.

For the mp3 conversion from youtube to mp3, it must be a homemade script.

I've also noticed that there is a http error (451) and the mp3 part of this website is Unavailable For Legal Reasons.

Create a quality content relevant to the niche you choose.
Try to build more links and if its a you tube website then share it by using social media.
Use attractive catche file to get more viewers.Use Meta tags that describes about your niche.
Many sites available that could convert video files to mp3.