You plan to deploy a website to Azure that will be accessed by users worldwide and will host large video files. Which Azure feature should you use to provide the best video playback experience?

A content delivery network (CDN) is the best choice for delivering large video files to a global audience because it caches content at edge locations geographically closer to users. This reduces latency and improves playback quality by serving content from the nearest available server. An application gateway is a Layer 7 load balancer that manages web traffic to backend pools, but it doesn't cache content globally. An Azure ExpressRoute circuit provides a private, high-bandwidth connection to Azure, which is good for hybrid scenarios but doesn't inherently optimize content delivery for global users. An Azure Traffic Manager profile distributes traffic based on various routing methods but doesn't cache content itself; it directs users to the best available service endpoint.