I did some work in a movie theater about 15 years ago when they were moving to full digital. The movies used to come on USB drives that were preprogrammed to only work at the times that the cinema had registered screenings with the distributor.
The staff all complained at the time because it meant that they couldn’t see the movie before showing it and thus couldn’t make recommendations to the customers.
The manager at the time told me that the USBs were temporary and that eventually the movies would be streamed directly to the theatre. (I think via satellite as part of my job was installing a huge satellite dish on the roof.)
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