The experimental interface for Google Video includes a link to "search options" which displays a sidebar that lets you restrict the results to a certain video site, choose a date range, the duration of the videos and if they are embeddable. Most of the options are currently available in drop-downs below the search box and in the advanced search, but the new interface makes them more visible and encourages their use.
What I don't like is that Google devotes less space to the videos, it's more difficult to scan the results and the player's position changes when you scroll down.
To try the new interface, go to Google Video and paste in the address bar the following JavaScript code:
{ Thanks, Shaz. }