Main media time has left the time window, at or after its end, or before its start when main media plays backwards.
Main media time hasn't reached warm-up yet, or time window when there is no warm-up.
Main media time is inside the time window, sidecar cut is playing.
Main media time is in warm-up, right before main media enters time window - before MediaContainerTrackTimeWindow.playerStartTime, or after time window end when main media plays backwards. Sidecar can play hidden and muted, ahead of its cut.
Position of main media time relative to sidecar time window, in main media playback direction.