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On an iOs device? Nothing I am aware of can do that on the stock OS, the person could be using the emulator in Xcode or they are running a Jailbroken OS.

Of course the person you cite is using Android so who their methodology won't apply the same way. I am not sure it would even be possible without JB.
 
recording isint possible unless your device is jailbroken.
not too sure of the apps on cydia that allow you to record but i'm pretty sure there are some paid cydia apps that do this.
 
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