To assist with professional (repetitive and consistent) action filming (cars, dirt-bikes, races, action sports, etc) I need the ability to define a custom waypoint flight path (which can be fairly complex), then when executing the mission: control the speed the drone travels down the path using the left stick and the camera angle using the right stick.
During launch dialog of automated mission select Manual Yaw / Manual Gimbal.
You will control with RC Aircraft Yaw (Camera Yaw will follow Aircraft yaw) and gimbal angle. In addition you can control with the other stick the speed.
We call this "Zip line" flying.