Google is expanding the number of those in its AdSense publisher network selected to test its video ads, and is now including ads from the Wall Street Journal and Conde Nast LE Networks. 

Google sent email invitations to some of its online-publishing customers this week, offering them the chance to participate in a pilot program featuring video ads from WSJ.com, LX.tv, and Conde Nast's Epicurious and Style.com, CNET reports. The ads will be contextually targeted based on the content of the websites.

Google is expanding a test announced earlier this week, in which it revealed that it would run ads from Sony BMG Music Entertainment and Warner Music on its publisher customers' sites. Ad revenue will be shared by the video content owner, the website publisher and Google. All ads will be billed on a CPM basis.

Google tested its videa ad system last summer, distributing MTV video clips over its AdSense network.