Google has finally made the right decision and it removed that were created when you clicked on a result from Google Video. Instead of directly linking to the original site, Google used frames to show both the external site and a list of related videos from Google Video. This duplicated the functionality from video sites like YouTube, while making it difficult to navigate and to share a URL.
Here's the first version of the frame, from June 2007:
... and a screenshot from April 2008, when Google Video has been redesigned:
Google Image Search uses a similar frame, but it's more useful as it provides information about search results. If you don't like the frame from Google Image Search, you can use Greasemonkey scripts like Google Image Relinker or Google Image direct links to bypass it.