First go to upper right side where you can find sing who says ''upload''.
Than you will see some informations where you need to fill in needed info.
Info marked with * is oblicated,other you can fill in by your own thought or you don't need to fill them in.
Choose your name of video,and describe it.(This is video how to make dance with news...)Sepperate tags like: cp lol joke funny
news:and than choose do you want that video is private or public,and click upload.
New page will open,and you need to select video from your personal computer.(Or mac or linux)and find video in My documents,or wherever you saved it.
Wait untill video uploads and wait couple of days it will be able to watch on youtube.Of course minute after you upload it it will be able to show on your account,but not publical.
I hope this turtorial explains better.