Pricey if you want to scale to any real volume.

Create a CDN
A content delivery network (CDN) addresses issues of latency. In the world of broadcasting, latency refers to the delay in a live stream. In other words, a powerful video stream CDN is essential for delivering high-quality live streams to viewers both near and far.
To build your own CDN for your video streaming server, you must first decide if your delivery will be pushed through the cloud or physical remote servers. Physical servers are typically more reliable, but a cloud streaming server may be more realistic, depending on what resources you have available to you.
Once you come to a conclusion on a cloud vs. physical, you’ll need to choose technology for ISP and routing. Then, you’ll arrange the placement of your original server and PoPs.
From there, we recommend downloading Varnish, a CDN building tool, for support in tying everything together.