I am looking for free, high quality, video loops of things like rivers etc for "wallpaper" on a Mac. The kind of thing I'm looking for is video of fast flowing water over rocks etc. Here in Sunny Suffolk this sort of thing is conspicuous by its absence so I can't just go out and film it myself. Even a 10 second clip would be great, as long as it is loopable, I just can't find any anywhere that is free. There has to be stuff out there but I just can't find it. It is only content I'm after, I know how to make the video my wallpaper.

I know about Dreamscene but it seems to be for Windows only so is no good for me.

Any ideas anyone?