Facebook’s latest attempt at monetization includes video ads that are embedded inside games. The ads can be closed, but users that view that ads will be able to earn Facebook Credits — the company’s virtual currency — for watching the sponsored videos in their entirety. “It’s another way to get users to be more comfortable with Credits,” said Deb Liu, head of Facebook Credits. “It gets developers to adopt Credits and helps users understand what Credits are.” Sponsored videos will be rolled out to 350 games and apps on Facebook. The Facebook Credits that users earn can in turn purchase…