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…showed last 75 words of 1890 total…This system works by embedding a signal in a part of the video that is not usually seen by the user. This signal causes the brightness of the video to vary and for the picture to be unreliable. This same technology has been implemented for use with DVDs. Although it seems possible that some people may be able to overcome these copyright traps, the user has to have at least an 8, 10 or 17 GB hard drive.