According to a spokesman for Yahoo Video Search (WebmasterWorld PucCon conference 2007), 60% of the people online consume videos every month. Among the top things they look for are celebrity related videos, movie trailers and music videos.

The most popular video search categories in Yahoo! are:

• News
• Comedy
• Movies
• Music
• Cartoons
• Sports

How people search for video on Yahoo!:

• Users search from the video search box by topic.
• They search for domains where they are accustomed to seeing the videos they like.
• There are a huge number of searches performed on video sharing websites.
• There is an immensely long tail in video search, with people looking for a very wide variety of terms.

Yahoo! Video optimization tips:

• Tag your files with as many relevant terms as possible
• Provide context by surrounding your videos with text on the landing page.
• Use accurate metatags on the page where the video file lives.  

It is also very helpful in Yahoo! Video Search to provide the Search Engine with a Media RSS feed that tells it:                     

• the category the vidoe falls in
• relevant keywords
• a summary of the video 
• a transcript of the audio portion
• closed captions, if available
• a copyright notice to show ownership

Yahoo! also cautions that a submitter can get a bad history with Yahoo! Video Search by submitting adult content and content that violates copyrights.