Google has decided to end Google video website on April 29, 2011. Google has already stopped uploading of video back in 2009, and now they are completely shutting down the website.
All Google Video users have been updated about this change via a mail. Google has sent a mail to all Google video users that they closing down the website completely.
If you had a account on it, then Google allows you to download your video from it by 13 may, 2011
The reason behind closing down Google video website may be that Google want to concentrate on one video sharing website i.e YouTube. They also want to force old Google video users to use YouTube service.