Video isn't particularly latency sensitive. If I had infinite resources to design a complex system I would serve the first couple of chunks from the nearest POP to get the stream started and once I had enough of a buffer I would start optimizing for serving cost.
You don't need to move it around the world (TCP can start to bite you, but most likely you are just wasting someone else's network resources) but you can definitely move it away from the nearest POP if it is getting loaded. You can even do clever things like shard by chunk ID across warm POPs so that you get better cache utilization and reduce disk load.
You don't need to move it around the world (TCP can start to bite you, but most likely you are just wasting someone else's network resources) but you can definitely move it away from the nearest POP if it is getting loaded. You can even do clever things like shard by chunk ID across warm POPs so that you get better cache utilization and reduce disk load.