I believe there was some settop box that could decrypt the tapes. It was supposed to do encrypted media passthrough via FW and decrypted output via analog cables. However, due to a bug in the implementation, the box would decrypt the tape and pass the decrypted stream out via FW. So, all you had to do was hook up the box to your PC and run some sort of stream capture software. I'm probably wrong on some of the details but that's my basic recollection.
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