Yahoo Video search offers search refinements similar to those that the other two search engines do. It includes a box to check for "official videos," but I'm unsure what type of filtering this option performs. Some Yahoo videos play within search results. In other instances, Yahoo takes you to the site that hosts the video. Yahoo frames the sites hosting the video and plays the video below. When we searched Yahoo Video for Hulu content of the television show 30 Rock, videos would not play; instead, the video player displayed the message "required player parameters not provided."