See this, https://ratkutti.wordpress.com/2013/09/09/screen-capturing-in-phones/ i have talked about this way too early.
And today here it is, i wished Windows Phone to have it first, sadly it’ll be Android. See here
Future CyanogenMod ROMs Will Include Screen Recording Feature: http://www.ubergizmo.com/2013/10/future-cyanogenmod-roms-will-include-screen-recording-feature/
Posted from WordPress for Windows Phone 8 on a Nokia Lumia 720