dia that's currently buffered.</dd>
<dd><code>playbackSpeed</code> - The current factor by which playback is sped up.</dd>
<dd><code>rebuffering</code> - Whether the player is rebuffering. A rebuffer is defined to be caused by
     buffer depletion rather than a user action. Hence this parameter is false during initial
     buffering and when buffering as a result of a seek operation.</dd>
<dd><code>targetLiveOffsetUs</code> - The desired playback position offset to the live edge in
     microseconds, or <a