AI-powered movie remixing is rapidly taking over social media platforms, transforming from fan-based entertainment into a vital tool for film promotion. 'Buffalo Boys' is a prime example of a film that achieved explosive popularity through audience-driven remixing. AI technology has lowered the barrier to entry for remixing, enhanced creative efficiency, and enabled audiences to assume dual roles as both producers and consumers. This has fostered a 'cyber carnival' of mutual benefit among copyright holders, platforms, and audiences. AI remixes of different films exhibit unique characteristics: 'Buffalo Boys' embraces meme culture and rebellion, 'Welcome to the Dragon Restaurant' focuses on fulfilling unmet desires and wish-fulfillment fiction -style storytelling (web novels with satisfying plot twists), while 'The Eight Immortals.' leans towards collaborative fan creation. Copyright holders, such as Stephen Chow's team, have shifted their stance from resistance to active authorization, and major platforms have launched incentive programs for remixing. However, AI remixing has also sparked controversies over copyright infringement, narrowing of original work perception, and constraints on organic creativity. Remixing of public domain IPs risks causing aesthetic fatigue, while commercialization of proprietary IP remixes carries infringement risks. Moving forward, balancing openness and regulation in the remixing ecosystem will become a central issue.