Google has hosts in just about every ISP data center. They sent out their hardware to spam IT departments for decades. Other CDN like akamai are available, bu

Google has hosts in just about every ISP data center. They sent out their hardware to spam IT departments for decades. Other CDN like akamai are available, but the cloud business has eaten most colo providers lunches (a "gray" fiber network can be expensive to hold). Since Google has other services likely reusing the same internal CDN resources, their stream-traffic routing costs could be an order of magnitude lower than traditional providers. Just a guess, but live feeds tend to be high-latency for a reason... =)