Usually to search something in the web people use some keywords. Google provides an efficient way to make a search not only text documents but in the PDF, MS Word etc which are not readable without special applications. Now it’s time to search a video by words which occur there. Unfortunately, Google cannot help you but Blinkx can. Blinkx is the world’s largest and most advanced video search engine:
Unlike other multimedia search engines that attempt to re-purpose technology built for the Text Web, blinkx uses a unique combination of patented conceptual search, speech recognition and video analysis software to efficiently, automatically and accurately find and qualify online video. Today, blinkx is the world’s largest single index of rich media content on the Web, delivering more content from a broader range of sources than either Google or Yahoo!