Five years ago this week… Comcast brought YouTube aboard the Xfinity X1 set top in a move that was the tip of the iceberg of the operator’s long-term ambitions for aggregation and subsequent disruption with a slimmed down streaming bundle. Comcast had already converted 50% of its cable customers over to the X1 platform, with a target of 60% set for the end of 2017, while X1 voice remote deployments were at 13 million. Faultline felt at the time that the personalized content discovery offered by X1, drawn from a variety of sources, was a shining example of forward-thinking aggregation of OTT content. — The day has arrived sooner than expected. HBO Max has jumped into live sports streaming…