> For reasons I don't understand, almost no one except Google can reliably stream video. Scale. YouTube (Google) can encode an uploaded video into a number of

> For reasons I don't understand, almost no one except Google can reliably stream video. Scale. YouTube (Google) can encode an uploaded video into a number of codecs and store those encoded bitstreams all over the world in data centers. All the backhaul goes over their private backbones. Hot videos will stream from edge caches topologically close to clients. Because YouTube infrastructure is Google infrastructure it gets the same scale as the rest of Google. Other video hosts have similar technical architecture/topology but at vastly smaller scale than Google.