Even lowly VHS stores the video as 2 separate signals (s-video). I wonder what led the Laserdisc engineers to the "composite storage" decision?
BTW, I still have a couple of RCA Selecta-vision "video-records" in my basement (they use needles, not lasers). Those have really deteriorated over-the-years... clearer than VHS, but with lots of noise in the signal.
troy