Kellex from DroidLife explains in a recent article that, with the help of the Android SDK and the command line utility ADB, you can use the command “screenrecord” to start capturing your screen and saving it to a video file. You can use operators to change the length of the recorded video, but as yet cannot simply press start to begin or press stop to end.
Use these operators to determine the length of your screen recording. If installing the SDK and using command line utilities intimidates you, never fear; there’s an app for that. Developer cr5315 Application Industries has released an app to the Play store called Android 4.4 Screen Record which provides a simple user interface for triggering “screenrecord.” All you have to do is press a button to start recording a three minute video. Share this with any friends you have with a newer Android device to make sure they take advantage of this cool new feature. Original Source – DroidLife – Android 4.4 Tip: Screen Recording Takes Screenshots to a New Level