• Filename, title, description.
  Same as above
• Video Files Metadata
  Same as above
• Keyword “video”
  Same as above
• Links and Backlinks
  Same as above
• Make good thumbnails, first and the last frames.
  A video thumbnail is what users view when they are deciding between which videos to watch. Different video search engines will grab thumbnails differently. Some will use the first frame while others will take a frame from somewhere in the middle. You will need to experiment with each site to make sure they are displaying the right thumbnail for your video.
• Branding
  The first and the last frames are perfect for branding. Place your logo there, as well as your URL and any other information you think is applicable.
• Uniqueness
  More than anything, make sure as well that your video is creative and unique. This is the best way to attract backlinks from people who want to share your video.

• Use social bookmarking sites and tools to assist in the visibility of your videos, add backlinks to your videos, and create traffic.
• Train editors to think like video searchers

Optimization in the Future:
As search engines are working to better determine the content and relevance of multimedia content, the methods that we use to optimize websites and in particular, videos, images, and audio in the future may be quite different. Currently optimization still relies upon including Meta data and keyword information in or surrounding the current content.

With search engines like Blinkx.com, who claim to rely more and more so on OCR (optical character recognition), voice/speech recognition, and image recognition, optimization of video content will likely be much more so about the quality of the video itself. For example, if Blinkx.com relies upon voice recognition as an example, it would be important to make certain that you are speaking clearly in the video so as to make the job of voice recognition easier for the search engines.

However, take a look at this interesting post from Danny S. on Search Engine Land. Danny explains that Blinkx and other still rely heavily on meta data for searching. Danny also reviews some tests that he conducted with video searches.

Source:reelseo.com