Via MSDK: MSDK provides RTMP streaming function, which can directly push the stream to the RTMP server. So it is possible to view it on the ground.
Via WSDK: The windows SDK can directly obtain the video stream, but it should be noted that the windows SDK supports limited models and only supports develop UWP application.
Via OSDK: OSDK runs on the onboard computer to obtain the video stream. Need to develop the function by yourself to transmit the video stream of the aircraft to the ground.