How do people earn by uploading lyrical videos on YouTube.

Hello mates, I was wondering if anyone is doing the same. I came across so many channels that upload lyrical videos and gets millions of views within few days which is really really amazing. Since a lot of them are already in business, it is quite obvious that they are earning a good amount of money with that. Even they are partnered with MNC. I just wanted to know how all this works out. Even i'm thinking of starting the same thing now. I already have four channels with 2 football/soccer channels and vines compilation and its going tremendously well. I want to earn more and more like 10k at least monthly.

I like how you have no idea how they are earning, but you know that it is a lot. I do not think that you will earn even close to $10k with this "method"

They could be bringing traffic to their website. Or most likely using AdSense on youtube.

There are 2 ways.
1st - they are cheating content ID system.
2nd - they are not making any money, ads put in their videos because of the content ID and gives all income to copyrights owners.