LivePlay
data class LivePlay(val hlsUrl: String, val dvrEnabled: Boolean = false) : LiveStreamPlayerState(source)
Stream is Running. Play hlsUrl. dvrEnabled mirrors the stream's DVR setting: a DVR live stream shows a seekable timeline (+ jump-to-live); a non-DVR one hides the VOD-style timeline and time counter (its window-relative position is meaningless), leaving just the LIVE badge.