UFO over Mediterranean sea

Flying eastbound over Mediterranean sea few days ago we spotted some lights maneuvering very high at great distance. Although quite obvious in this case it is hard to distinguish the moving objects from the planets and stars at night without proper reference. In this video there are many references to compare the UFO's trajectory to. First one is bright Venus on the right just above the horizon. The second is the HUD data (horizon line, heading, altitude, etc). Note there is no heat/infrared signature picked up from these objects.