I built a moving turret with a harmless pink Airsoft rifle attached to it and programmed an app to control it. (I spray painted the rifle pink, because German gun laws are weird) I show how I can control it with a custom app running on an iPad. The app also displays a live view of a camera mounted on the gun. At the end of the clip I included some B-roll which might be useful for your voiceover before the clip. I'll be happy to provide more footage and explanations as well :)