Vid-Biz: YouTube, Comcast, EXPN

MediaSet Sues YouTube, Google; Italian media company says it found 4,643 copies of its programming on YouTube and is seeking damages of $779 million. (CNET)

Comcast Reports Q2 Results; cable company loses 138,000 basic cable subscribers, adds 320,000 digital subscribers (check out its broadband numbers over at GigaOM). (The Wall Street Journal)

ESPN Rebranding Extreme Sports Site; EXPN to become ESPN Action Sports, will be the hub of the ESPN Action Sports Network sites comprising verticals for surfing, skateboarding and more. (Broadcasting and Cable)

YouTube Now Part of Prank Emergency Calls; over in the UK, hoaxsters are calling up their version of 911, asking silly questions and posting vids on the video sharing site. (PC Pro)

Tennis.com to Blog for NBC; online version of Tennis magazine to live-blog Olympic tennis matches on NBCOlympics.com. (MediaWeek)