Spotted on News.com, you can now watch Google Video's on your mobile phone. This is a third part application created by Scott Robbin (not Google) where you can visit http://srobbin.com/mobilevideo/ on your mobile device, conduct a search and then watch the video. The requirements are:
+ Your phone has an XHTML-compliant browser
+ You have enough storage on your phone to hold large files
+ Your phone's connection is fast
+ You have an application on your phone capable of playing AVI or MP4 files
Here is a demonstration Scott posted on YouTube (interesting why he didn't post it on Google Video). :)
More details at Scott Robbin's Blog.