Went looking for information on why this inexplicably doesn't work. Found out that people have been complaining about it for a year and a half. Still not resolved. Personally, I pay for HBO's service -through Xfinity- but can't watch it on Xfinity's OnDemand either (says I'm not signed up for it). HBO Go is all that works and I need to be able to watch it on a PS4. Come on Comcast/Xfinity/WhateverYouWantToCallYourself. Its not rocket science.
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