first of all sign in or make a youtube account.
when your ready get a camera and make a film.
after that go on your youtube account and connect your camera to the computer. copy and paste the film you made to your Documents. at the top right corner of the youtube screen you will see "upload" click on it. after that you will see another page with "upload" at the middle. click on that and you will see your Documents.
look for your video and it will upload for you.