The BBC Motion Gallery is a fantastic resource for video reference with comprehensive categorization of all its movies. I’ve spent hours combing through the clips. If you’ve got a Mac and OSX Tiger, they’ve released a Dashboard search widget to make finding just the right clip a snap. Separate search words with spaces and it will pare down the results. I searched ‘dog fight’ and it came up with a charming clip of prairie dogs fighting. Amazing!
Thanks to The Unnofficial Apple Weblog (TUAW) for the link.