Thats what they do, but better. Example they have their own CDN and put the nodes in your ISP facility. Using per-title-encoding, allows you to have less rendi

Thats what they do, but better. Example they have their own CDN and put the nodes in your ISP facility. Using per-title-encoding, allows you to have less renditions for a given video, having better cache hits. Another example is pre-fetching data to the CDN nodes(when a new episode or season of a popular show comes out). Its just extra optimizations that come up and are worth it at scale.