America Online this week is rolling out upgrades to its Video Search engine, expanding the index with 1.8 million videos from its recent acquisition of Truveo. The content joins 20,000 original and licensed videos, as well as 2.5 million videos indexed through AOL’s Singingfish search product.Truveo seeks out video content on the Web using a method called “Visual Crawling.” AOL says it was interested in the way Truveo discovers a wider range of new videos and related information from dynamic Web pages, calling the company a “hidden gem.”AOL has additionally streamlined the presentation of search results, and added AOL Hi-Q Videos, which it says are DVD quality and available free of charge. For more you can visit here.