Apple is sure to pull down the app Display Recorder any second, however you can download it now for $1.99 if you act fast. Although its video quality is inferior to the jailbreak app with the same name, this knockoff app will provide a useful feature for iOS users who aren't interested in jailbreaking their devices to capture screen video.
Display Recorder rips off the name and many of the features of developer Ryan Petrich's app that has been available on Cydia for some time. Basically you open the Display Recorder app and press record. As you navigate back to the home screen everything you do on the iPhone is recorded, along with a soundtrack from the microphone.