Yes it's hard to get money on YouTube but remember it's a continuous income for doing nothing if your videos continue to get views and grow.

It's hard work but just like Steemit it's a great platform to learn new things and make new friends.

Your payout is based on how the person interacts with the video as well as how much in demand the keywords are and how much advertisers are willing to pay for their target market to see it. Do they watch it all? Do they click in it? Do they read the ads in the side and underneath etc.

The country in which the viewer is is also very important. Richer countries with stronger currencies pay more.

Hope this helps potential Youtubers understand adsense a bit more. Youtubers normally make money from multiple income streams and not just YouTube adsense...