News of Note—Comcast, AT&T, YouTube and more

Here is some of the other news we've been tracking today:

> TDS Telecom has completed its purchase of Merrimac Communications. Multichannel News story

> Comcast Cable CEO Dave Watson will be the featured speaker at the SCTE*ISBE’s Leadership Institute at Tuck Executive Education event on May 6. Press release

> NBC said the ratings for its broadcast of Super Bowl 52 marked a 143% improvement over the ratings for this season’s NFL playoff games, claiming it as the best margin ever for a Super Bowl over the same season’s playoffs. FierceVideo story

> YouTube Go, the company’s "offline-first" app designed to aid in watching videos on slower networks, is expanding its availability to 130 countries. FierceVideo story

> AT&T, Verizon and T-Mobile have all reported record-low churn figures in recent quarters, but Sprint is reporting the opposite. FierceWireless story