Yahoo! has added a Video Search tab on the front page of Yahoo!, making it easier to find and use:

Of course it's also integrated into tabs on search.yahoo.com

According to Andy Volk (Video Search Product Manager): we may see more content coming from Yahoo!'s growing list of feed partners, which includes Real Networks, AtomFilms, and IFILM. In addition, you can already find video content that Yahoo! has indexed thanks to content publishers adopting Media RSS.

Yahoo!'s newest feed partner is TVEyes who will allow them to index closed captioned broadcast video content not previously available online, enabling you to "search inside the video." Their sources include broadcast video from Bloomberg, BBC, and BSkyB--that's just for starters.