The proliferation of online video consumption, particularly for live events attracting massive global audiences, necessitates robust and scalable content delivery mechanisms. This article explores the critical role of Content Delivery Networks (CDNs) in facilitating the seamless distribution of live video streams to millions of concurrent viewers. It explores the fundamental architecture of CDNs, including edge servers, routing methodologies such as Geographic Load Balancing and Anycast Routing, and the importance of caching and content replication. Furthermore, it analyzes how these technologies are specifically applied to the delivery of high-demand live events, using the "Big Game" as a salient example. The "Big Game" refers to the major annual championship football event in the United States that consistently ranks among the most-watched broadcasts worldwide. The document concludes by considering emerging trends in CDN technology that promise to further enhance the efficiency and performance of live video delivery.