Mux Data can now track Video Startup Failure Percentage in the Monitoring Dashboard & API.
Video Startup Failure is defined as playback failures that prevent the user from seeing the first frame of video, be it video content or ads. This metric is a subset of Playback Failures.
At the event level, Video Startup Failures occur when a viewstart, play, or adbreakstart event is triggered but an error event occurs before playback begins, aka playing or adplaying event is not received, suggesting that playback never began.