As for "dual audio," I'm assuming you're referring to a version of the movie with two audio tracks, possibly in different languages. Dual audio films are often used to provide language options for viewers who may not be fluent in the primary language of the movie.
– A slider lets you choose: [ Always Dubbed ] <— Balanced —> [ Always Original ] At “Balanced,” the app switches ~20–30% of the runtime to original audio for emotional beats. cast away dual audio