harrymcc writes: In 1972 -- years before Betamax and VHS -- a Silicon Valley startup called Cartrivision started selling VCRs built into color TVs. They offered movies for sale and rent -- everything from blockbusters to porn -- using an analog form of DRM, and also let you record broadcast TV. There was also an optional video camera. And it was a spectacular flop. Over at Fast Company, Ross Rubin tells the fascinating story of this ambitious failure.