What technology does Baidu's video search use?

Baidu Video Search (video.baidu.com) - by entering search terms in the search box, you can find all relevant video search results. However, this kind of video search by Baidu is not what is typically defined as video search internationally. Currently, the world recognizes only one key-frame video engine: Autonomy Systems from the UK. Both Yahoo! and Microsoft provide video search to users through cooperation with Autonomy Systems.