Starting KitKat and above, android has screen recording capabilities inbuilt. The usual way needs you to install android sdk and manually run adb commands. But for an easier once click way, see this-
http://www.skipser.com/p/2/p/record-...n-android.html

It basically boils down to -
- Download and unzip a zip file.
- Connect phone to PC via usb.
- Double click on "RecordScreen.bat" to start recording.