Though the fourth version of iOS enabled custom background images on iPhones, as of January 2011 no system option exists to use a video behind your springboard icons. Users of jailbroken phones, however, can download vWallpaper, an app that plays any video of proper resolution in a repeating loop on your background. Installing the app requires downloading it from Cydia, adding videos over your SSH connection and running the setup application to select the video.
1. Tap the “Cydia” icon on your jailbroken iPhone’s springboard.
2. Open the “Manage” tab after Cydia finishes updating. Press the “Sources” button.
3. Press “Edit” in the upper-right corner, then “Add.”
4. Type “http://deb.danstaface.net” and press “Add Source.” After Cydia verifies the source, press “Return to Cydia.”
5. Open the “Search” tab and type “vWallpaper.” Tap on the “vWallpaper” listing in the search results.
6. Press “Install,” then “Confirm.” After the download finishes, tap “Return to Cydia,” then press the “Home” button on the iPhone to quit.
7. Connect to your iPhone from your computer via SSH, just as when you copy other files to the jailbroken system.
8. Copy your video files into the directory at “/private/var/mobile/Media/Skrew/Videos/” and close the connection.
9. Tap the “vWallpaper” app on your iPhone. Select the video file to use as your background and press “Enable.” Your iPhone will respring with the video background in place.