SaveHollywood Turns Any Movie Into a Screensaver on OS X
Mac: Screensavers aren’t the most exciting thing to do, but if you’ve ever wanted to use a video file as your screensaver, SaveHollywood is an easy and free way to do it.
SaveHollywood works with almost any video file, and you can choose either a single video or an entire folder. It also works with any videos you shoot on your iOS device, so in theory you can create your own screen savers. SaveHollywood is designed for public screensavers, but it’s a fun little thing for everyone.
Save Hollywood (free)