What best can be that you get paid for uploading videos, is that so simple. No, you wont get paid for uploading only. You will get paid only when people watch the video you have uploaded on youtube. You basically get when an ad is clicked or video ad is seen on your video. You get some commission each time a user clicks on ad running on your video or video ad is watched by the user.
To learn more about how you can earn from Youtube please visit the link to download the pdf.