What Is a CDN?
A Content Delivery Network (CDN) is a geographically distributed network of servers that work together to deliver content to users faster and more reliably. Instead of serving all requests from a single origin server, a CDN caches and serves content from the server node closest to the user.
Why CDNs Matter for Video
Video streaming is one of the most bandwidth-intensive activities on the internet. Without a CDN, all video requests go to a single server, which can become a bottleneck during peak traffic, resulting in buffering, slow load times, and poor viewer experience. A CDN distributes this load across many servers worldwide, dramatically improving performance.
How a CDN Improves Video Delivery
When a viewer requests a video, the CDN routes the request to the nearest available server node. If that node already has the video cached, it serves it directly without contacting the origin server. This reduces latency, improves start time, and ensures smooth adaptive bitrate streaming. CDNs also provide redundancy — if one node fails, traffic is automatically rerouted to the next closest server.
CDN and Video Quality
A CDN works in tandem with adaptive bitrate streaming (HLS/MPEG-DASH). The CDN delivers the video segments quickly, and the adaptive algorithm ensures the viewer always gets the highest quality their connection can handle. Together, these technologies provide a premium video experience regardless of the viewer's location.
Kavimo and CDN
Kavimo integrates CDN delivery for all hosted videos. When you upload a video to Kavimo, it is automatically distributed across CDN nodes, ensuring fast, reliable playback for your viewers wherever they are in the world.