said by GhostDoggy 
:You're kidding me. They cannot even allow you to stream video recorded on one HR21/22 to another HR21/22 in the same household and on the same network. I'm seriously doubting its a technological limitation and more a political condition.
Of course, if this has changed then my ignorance is doing be a nicely this morning.
While you can't do this now, DirecTV has said they would have a 'whole house DVR' solution. They've so far added the capability to stream video/audio/JPEG from a PC to the DVR, now stream from the DVR to the PC. The best guesses are that the next step would be the DVR to DVR streaming. 
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