To earn money you need to join You tube partner ship program.
Membership for you tube partner program is free.
if you are interested in creating nice useful video and uploading them
then you should join YouTube Partner Program
The YouTube Partner Program provides creators with resources and opportunities to improve their skills, build larger audiences, and earn more money.
As a YouTube Partner you will join a global community that includes members ranging from musicians to filmmakers, comedians to athletes, and hobbyists. Getting started is quick and easy.
Just start creating educational,Entertainment or whatever topic you are intersted in.
Then upload it on You tube.
To become a YouTube partner, content creators must abide by YouTube’s Community Guidelines. Admission to the Program varies by country; learn more about which process applies to you or simply get started.
Depending upon the number of views you will earn money.
You tube Partnership Program is a revenue-sharing program that allows creators and producers of original content to earn money from their popular videos on YouTube. You can earn revenue from relevant advertisements that run against your video using Google''s proprietary technology. The program is based on cost-per-impression advertising
To start click on the below link: