httpvhd://www.youtube.com/watch?v=N6L07nPrjzo&feature=player_embedded
Don’t have an iPhone 4 but still want to use iMovie for iPhone? There’s no real reason it can’t work on the likes of the 3GS, and so it does, with a little jailbreaking.
The hack’s easy enough. If you’ve got a jailbroken iPhone, you just edit the info.plist file of the app and change the “Minimum System Version” to 3.0.0 and “Front-Facing Camera” to False. Launch the app again and you’ve got the ability to edit videos on your last-generation iPhone, seemingly without much performance degradation.