Casablanca as a film pioneered many cinematic techniques and aspects of film, used acting techniques that hadn’t been used previously such as by Stanislavski’s method, and utilized technical aspects of film rarely used previously, and only used in “big budget” films of the day like “Metropolis”. Casablanca used cinematic techniques that had rarely been used before, such as tracking shots, lighting based on day and night, and close-ups. The film has actors channeling genuine emotion rather than pretending that they’re angry or happy or sad. The actors also are learning how to act on film rather than how to act like one might on stage, and this understanding would be in more depth as time went on, because Casablanca essentially created this
