Fullscreen, the YouTube multichannel network whose backers include Comcast and The Chernin Group, is expanding senior ranks, hiring two execs in newly created roles: Ashley Kaplan as head of content and Michael Wann as chief revenue officer.

Kaplan, charged with overseeing ongoing production and development of premium content with talent and brands, most recently was VP of digital content and strategy for production company Magical Elves. Previously she worked at Viacom, where she helped launch Logo’s digital content department, and was a producer at Current TV.

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Wann hails from SpinMedia — publisher of pop-culture websites including Spin and Vibe — where he was chief revenue officer. Previously he worked at Demand Media, Amazon.com and MSNBC.com. As Fullscreen’s CRO, he is responsible for developing new and existing revenue opportunities for the company and its creator network. Wann will oversee biz dev, integrated marketing and advertising operations for the company.

Based in Los Angeles, the company was founded in January 2011 by CEO George Strompolos. The MCN’s network of creators include The Fine Bros., supergroup Our2ndLife (O2L) and violinist Lindsey Stirling.

Fullscreen brings Kaplan and Wann on board following its January acquisition of Supernova, the mobile-video startup formerly known as Viddy. The company says more than 40% of Fullscreen’s total viewership comes from mobile devices, compared with less than 10% two years ago.