ANSWERS: 1
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I doubt it. It would strike me as obvious, and hence unpatentable. TV shows were released to the public on videocasettes in the 70s, and to broadcasters in the 60s. This wasn't thought patentable at the time, and patents only last about 20 years anyway, so there would be patent to claim on in the 2000s even if the had been one in the 60s, which I doubt. The change from videocasette to DVD, given that the DVD was designed as a replacement for the videocassette, must be regarded as obvious.
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