Your origin server may be fast, but physics imposes a minimum latency based on geographic distance. A viewer in Tokyo accessing a server in Amsterdam experiences at least 200ms of round-trip latency - and for video streaming that requires multiple round trips for segment requests, this latency accumulates into noticeable buffering and slow start times.
A content delivery network solves this by caching your content at edge servers distributed worldwide. When a viewer in Tokyo requests a video, it is served from an edge server in Asia rather than your origin in Europe. The round-trip latency drops from 200ms to under 20ms, and the viewing experience improves dramatically.
For adult sites, CDN benefits extend beyond performance. Edge caching reduces load on your origin server, allowing it to handle more unique requests. CDN providers absorb DDoS traffic at the edge before it reaches your origin. And CDN cache serves as a buffer that keeps your site partially functional even during origin server maintenance windows.