Image and Video Extraction - How to do it?

I've seen sites such as Google Images and Altavista where you can view thumbnails of images/videos online. How did they do this? Of course I will need to code something, but does anyone know of any good software that is out there that can do it already?

Thanks

 

Just to explain further, I'm looking for code which will allow me to do something like these sites:

http://www.singingfish.com/

http://www.altavista.com/video/default

Can anyone point me in the right direction I checked out Sourceforge and Freshmeat with no luck!

 

Hi liwei, the only thing I can think of that may be of some help is Dreamweaver's Commands>create web photo album - you'd have to screengrab all your vids to start with and then modify the result of this operation. There *must* be a better way but I don't have that knowledge HTH

 

What does HTH stand for?

 

Sorry, Weirfire, just got stuck in a 3 hour long 1 hour meeting

HTH = Hope That Helps