Until the 1980's, nature documentarians like a David Attenborough, could only film underwater for 10 minutes at a time before rising to the surface to swap out the film roll which had just been used, as it would be full after such time. Video tapes solved this issue as they permitted the person using it to film for 30 minutes. Video tapes were also more sensitive than traditional film reels and therefore low light conditions could be filmed for the first time, making artificial lights unnecessar...
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