What indicates a pilot video source failure?

A pilot video source failure is indicated when there is frozen or lost video combined with active telemetry. This situation suggests that although the drone's telemetry system is still communicating data related to its position, status, and other critical information, the video feed—which is crucial for visual navigation and surveillance—has failed.

This scenario is particularly concerning because the transmission of telemetry data implies the system is still operational in some capacity, yet the inability to receive a real-time video feed hampers situational awareness. If the video were clear but without telemetry or if telemetry is stable with clear video, it would indicate that the system is functioning properly. Intermittent video with active telemetry would suggest inconsistent video quality but not necessarily a complete failure of the pilot video source, thus further supporting why "frozen or lost video with active telemetry" clearly points to a failure of the video system.