Two options that might work for you: 1) wear a helmet cam or lipstick cam mounted on your headset, 2) if you need static views out a window, a lipstick cam on a RAM mount clamped to an internal frame member might work – vibration can be an issue. A temporary installation should not require an STC so long as the camera is not mounted on the exterior of the aircraft, but you can call the local FSDO for confirmation. Make sure you secure the cable and camera that your lipstick cam is recording to, you don’t want anything flying around during a maneuver.