My guess is changing gear position obstructs antennas. Carbon fiber shields radio waves. The 2.4 antennas on the H are right next to the landing gear legs. Perhaps a slight bend in the antenna wires to reposition them would correct the video loss issue. As obtained from the factory, one of the 2.4 antennas is taped to the body. Remove that tape.All Europe has the same problem. We must contact the Yuneec. No upgrade did not solve the problem. At least tell us what it is, and if there is a solution.