YouTube's chief business officer to exit
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   YouTube (NASDAQ:GOOG) (NASDAQ:GOOGL) veteran executive Robert Kyncl is leaving the video company early next year, and is exiting his role as chief business officer, Variety reports.    Kyncl spent more than 12 years as a senior executive at YouTube. âUnder his leadership, YouTube forged new relationships and partnerships in music, traditional media and tech, and our creator ecosystem â without him, the term âYouTuberâ wouldnât be a mainstream term," YouTube CEO Susan Wojcicki said in a memo cited by the outlet.    Taking over for him is Mary Ellen Coe, who's most recently served as president of Google Customer Solutions.