You can earn money from YouTube by uploading videos in it. When you got more views you will be paid but your must be monetized. You will be paid only if your channel is monetized. YouTube earns money by playing ads in the videos, if your channel is monetized then you will be paid otherwise YouTube will take the money. The steps to monetize your YouTube channel are :

1. Create A Channel:
 Create a YouTube channel and add all info about your YouTube channel, country, logo, banner.

2. Verification:
You need to verify your mobile number with your YouTube channel. Verification lets you to upload videos longer than 15 minutes, add custom thumbnails and do live streams. If you want to get monetized then mobile number verification is mandatory.

3. Monetization requirements:
Your channel must have 1000 subscribers and 4000 watch hours to be eligible for monetization. And  there should be no copyright claims, no copyright strikes and no community guidelines strikes. You have to reach every requirement to get monetized.
YouTube Monetization eligibility requirements