dFractionToLiveEdgeForQualityIncrease</code> - For live streaming, the fraction of the
     duration from current playback position to the live edge that has to be buffered before the
     selected track can be switched to one of higher quality. This parameter is only applied
     when the playback position is closer to the live edge than <code>
     minDurationForQualityIncreaseMs</code>, which would otherwise prevent switching to a higher
     quality from happening.</dd>
<dd><code>adaptationCheckpoints</