Transpera, a mobile video ad network, will serve up ads whether users are on smartphones or tablets, for instance.

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Google has tried inserting overlay ads into videos, and on Tuesday, it launched a new program to distribute ad-laced, commercially produced YouTube video clips to sites through its AdSense network.

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Google (nasdaq: GOOG - news - people ) has tried inserting overlay ads into videos, and on Tuesday, it launched a new program to distribute ad-laced, commercially produced YouTube video clips to sites through its AdSense network.

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