NAT does not support direct uploaded video's. They need to be hosted elsewhere on the web and then you can provide a hotlink to them here. I'm not familiar with the process of uploading stuff to Youtube but you will need to either upload your video's to your Youtube account or to a photo hosting site that supports video's.

Here is one I have hosted on my image event account in this thread.

http://talk.newagtalk.com/forums/thread-view.asp?tid=595297&posts=1#M4931619

Here is a post on how to make the links here hot if your browser does not do it automatically by simple copy and paste methods.

http://talk.newagtalk.com/forums/thread-view.asp?tid=597190&posts=1#M4951247