not the same, but years ago i worked on a cctv/dvr system for a Giant Electronics company. we watched HOURS of video (most w/o audio) as part of the rma process. there was good reason for it, as a failure in a circuit is sometimes a function of heat and time. there was one case where the device's ambient temp would spike and the video encoders would produce garbage output every few minutes. replacing the encoders resolved the issued. we kept a locked cabinet where drives with potentially sensitive video was kept, for instance we had a device that had been at a bank during an attempted robbery and had been malfunctioning. we stored the drive until it was certain the recorded data was corrupted, and not the playback system on our device. eventually the authorities agreed to take custody so we could get it off our hands. i was on the tech end of things and not the business end, so i cannot say what sort of privacy expectations our customers had. most of these were installed in businesses...but we did have a few from private residences.