Hello. The Comcast Xfinity service is great, however I have noticed that some of the channels store more of a program than other channels do. For example, some channels have programs that last an hour, but the DVR only let's you go back up to about 20-something minutes, rather than the whole length of the show, or more. While on the contrary, other channels let you rewind back to up to like 2+ hours worth of programs. Is there a way to change this, or is the length based on the channel?
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