I have the same issue. Some DVR recordings are fine, some will not play sound. This happens on my ipone and my apple laptop. Plays, with sound okay on set top box connected to TV. On demand is more ok but DRV recordings are what does not work the most. I have tried different browsers, clearing history, just about everything I can thing of. Only way to watch DVR shows is to wait until it is on demand and then watch that, not the recorded...?
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