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.
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To try the new interface, go to Google Video and paste in the address bar the following JavaScript code:
{ Thanks, Shaz. }