I have a scientific video site and i would like to intergrate google custom search into my site since its search engine is not working very efficiently. However, since it is a video site, i would like google search filter only video pages and show images of the videos on search results. These are the video images that are already cashed by google due to video sitemap of the site. I saw some examples of this on other sites. Let me know if you can help me with that.