screen vid recorder

To record a video of your Android screen (or to screencast) is extremely easy if you have a device running on Android 4.4 KitKat that is rooted. All you need to do is to download SCREEN VID RECORDER from the Google Play Store.

scrren vid recorder is a beautiful, modern app that captures video of up to 1 hour and can even record Android sound (not system sound, though, it only records from the microphone). It runs in the background and you can use it to record gameplay (and games and apps in general) on Android. After you use it to shoot video of your Android screen in action, you can enjoy 30fps video saved to your internal phone storage.
While Rec. is our favorite completely untethered way to record Android screen video, Recordable is the one that is most versatile: it works without requiring you to root your phone, and it also theoretically works with any version of Android, 2.3 Gingerbread and after. It does not do miracles - it is still impossible to capture system audio (you only grab mic recordings), but video turns out smooth and perfectly usable, even for game videos

The most sure way to record Android screen video is screen vid recorder