Comments by "Lawrence D’Oliveiro" (@lawrencedoliveiro9104) on "Emile Berliner's Fix: Flatten the Cylinder to a Disc" video.

History repeats, doesn’t it?
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11:40 Funny, he exerted the same level of tight control over his movie-making patents. But since there was no rival technology on offer as an alternative to his, the US movie industry responded by relocating away from where it started -- in New York -- to the other end of the country to get away from him and his lawyers.
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Re the up-and-down versus side-to-side motion: stereo records make use of both: motion along one axis gives you one channel, along the perpendicular axis gives you the other channel. I think they’re actually oriented diagonally, so each channel gets both vertical and horizonal motion.
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Re cylinders versus disks: history kind of repeated itself about half a century later with magnetic media, though the technological tradeoffs were slightly different. Magnetic drums (cylinders) were considered to be faster, since they tended to have a dedicated read/write head for each track, while disks usually had a single set of heads that had to move back and forth from one track to another. But the latter could pack more data into the same space, were cheaper to make, etc etc.
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