What are the best settings to make a movie with a Nikon d5100?

I'm borrowing my friends camera and he forgot to give me the manual. I've been tinkering with it but still need a lot of help.

Added (1). Actually I'm not going as far to make a full length movie yet. It's a video for Youtube. I just want it to look the least ameturish as possible. I know its a digital camera so it will inevitably be that way at least a little but I want to try. When I uploaded some of the video to photobucket it didn't look that great. Kind of grainy and almost like some obsolete camera.

It all depends on what type of atmosphere you are looking for, what type of movie is it?