The Universal Search breakout session came up with some quick hits RE: best practices for video and image optimization.
1 - Make sure your site has image and video labels, alt tags and
sitemaps
2 - Try to make sure your videos are under 5 minutes
3 - Think about the content. Create how-to, humorous, or otherwise entertaining/useful videos to drive traffic
4 -
Preview some of the available voice-to-text solutions (to pull out the keywords and optimize them) as an option for video optimization
5 - Lastly, decide whether you have video content that
can be repurposed for the Web before you go out and develop new clips