Optional ReadonlydrmDRM Configuration overrides for this track.
Optional ReadonlyextraExtra application data to associate with the track.
Optional ReadonlyqualityQuality metadata. May be used to configure DRM (for native HLS), codec, or other track metadata.
Optional ReadonlystartThe time to seek to when the track has been activated. For MSE tracks this will affect pre-fetching.
General configuration for tracks set in track load options.