These are some of the types of connectors and communication protocols that are used to complete the flight controller and video relay systems onboard drones. The PPM signal wire is a type of multiplex communications bus that carries the signals from the pilots hand controller to the vehicle. The video wire is from an analog video source and is either fed to an OSD(On Screen Display) telemetry overlay and then into a video converter or transmitter to relay the signal back to the pilot/ground station.