A camera that is positioned on a wall between two rooms, however, you can only see one room at a time unless you log into the camera software to rotate it manually. If someone were to walk into the opposite room, the camera would never record the action. To solve this, to create a motion detecting/tracking base on which I could attach the camera so it would automatically reposition itself to wherever the motion was detected. So let's start building this Arduino Security Motion Camera.
Refer Blog for more details. https://www.dofbot.com/post/arduino-motion-tracker-for-camera-using-pir-sensor 
 
Demo video:
https://www.youtube.com/watch?v=_qcYX3LD7OM