“How would six terabytes fit into memory?”
A better question would be:
Why would anyone stream 6 terabytes of data over the internet?
In 2010 the answer was: because we can’t fit that much data in a single computer, and we can’t get accounting or security to approve a $10k purchase order to build a local cluster, so we need to pay Amazon the same amount every month to give our ever expanding DevOps team something to do with all their billable hours.
That may not be the case anymore, but our devops team is bigger than ever, and they still need something to do with their time.