A status that indicates whether playback is currently in progress, paused indefinitely, or suspended while waiting for appropriate network conditions.
- iOS 10.0+
- macOS 10.12+
- Mac Catalyst 13.0+
- tvOS 10.0+
- watchOS 3.0+
true, the value of this property transitions between
AVPlayer during playback depending on whether sufficient media data is available to continue playback.
This property is observable using Key-value observing.