A profile of London-based Mubi, a niche movie streaming service with 400 employees boosted by hit film The Substance, turning it into a real Hollywood player (Nicole Sperling/New York Times)

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Nicole Sperling / New York Times:A profile of London-based Mubi, a niche movie streaming service with 400 employees boosted by hit film The Substance, turning it into a real Hollywood player  —  Early on in “The Substance,” the body horror film starring Demi Moore that has been nominated for five Academy Awards …