As the demand for high-quality video content continues to surge, the effectiveness of adaptive video streaming hinges on the efficiency of dynamic content delivery policies. Traditional approaches face challenges in providing real-time adjustments to account for network conditions and user preferences. This review paper explores the transformative potential of blockchain technology in revolutionizing content delivery policies for adaptive streaming. We delve into the decentralized and transparent nature of blockchain to facilitate dynamic adjustments in real-time, considering factors such as network conditions and user preferences. Through an examination of existing solutions, case studies, and implementations, we showcase how blockchain can enhance the adaptive streaming experience. The paper also discusses the benefits, limitations, and future directions, providing a comprehensive overview of the role of blockchain in shaping the future of adaptive video streaming.