How can you upload videos? I don't get it, by a link directly to the youtube page or by some other kind?

Go to your profile, click add a video, and put the embedded code into the place where it says to put it in.

You get the embedded code by copying it, and you can find them at their YouTube page.

Ok, thanx. ^__^ Just two more questions
1. How do I delete my videos?
2. How do I edit my videos?

You can delete it by going to your account, and clicking "See all of ________'s videos"

Then, click the big red X next to the video you want to delete.

Sadly, you can't edit them. But, I personally suggested this a while ago.