vWallpaper is a great cydia app for the jailbroken iPhone. Je can have a video playing on you springboard and/or have a video ringtone. I don't like the first feature, it's makes you springboard a bit hyperactive. I more like a quite theme. But the vRingtone is awesome. Make your own if you like (I did). Now when someone calls you don't see the pic of the pic/number of someone who is calling you but a custom vid.
Tools used.
Pinnacle Studio(set to avi 320 x 480)
Ultra video Joiner (to convert to MP4 format)
CopyTrans manager (sync the vid to your iphone
iFile (iphone app to move vid in the right folder)
Itunes lib on the iPhone /var/mobile/media/itunes control/music/
Vwallpaper lib /var/mobile/media/skrew/vRingtones
vWallpaper
Elemental particles