Video search site Blinkx is launching on Monday a service to allow Web site publishers to put contextually relevant text or video ads alongside or in video clips. The new AdHoc video ad platform uses speech recognition and looks at metadata in the clips and ads to match them up. For instance, the system would know to put a Home Depot ad with a video showing how to redecorate a kitchen. Separately, Blinkx is announcing that it will be powering the video search for the new RealPlayer, as well as powering video search for Infospace and extending a distribution deal with Lycos.