How do you make those fan-made videos?

You need to download whatever clips/episodes you want to use.
Then, if you have Windows you can use Windows Movie Maker to edit it or if you have a Mac, you can use iMovie. These programs come with your computer.

Or, if you want to do some fancy editing, you can buy an editing program with many more features, but these programs are pretty pricy so I'd try out WMM or iMovie first!

I make it with windows movie maker!
U need to have it at your computer!

I found the program on my computer but I was wondering how you can save clips of youtube?