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Google won't serve ads on top of some YouTube videos for fear of copyright infringement. Google's advertising partner Mogulus, a live-streaming video site, shares no such concerns. Mogulus overlays Google ads on every live streaming and recorded video uploaded to its site. The partial screenshot above shows a Mogulus user live-streaming an NBA playoff game with Google ads run along the bottom of the frame. (The NBA, like other sports leagues, strictly licenses broadcasts of its games.) Google may not be aware it's making money selling ads against copyrighted content. A tipster tells us Google agreed to to serve ads only against Mogulus's recorded content, not live videos such as the Lakers game above. A full screenshot:

This image was lost some time after publication.