In reply to Andy Nisbet:
as others have said the files will be there just not obviosuly movie files
a quick google suggests your camera uses a version of avchd format called mts
my suggestion would be
insert the SD card in your computer. (assuming you have a card reader, otherwise plug the camera into the PC using the cable that came with the camera)
open "my computer" and locate the disk. copy everything on the disk into the videos library on your PC (or somewhere else that you might prefer)
now go to the folder you've copied the files into and select it so it's highlighted.
top right of your explorer window, there's a search box.
type *.mts and hopefully some files will appear in the main window
if you have no program installed that will play these files then it'll complain when you double click on one.
if that's the case then the advice above about installing VLC is what i'd also recomend.
be warned there are iffy copies of vlc doing the rounds
http://www.videolan.org/vlc/index.en_GB.html
is the correct home page for the program
install it (you don't need to agree to any additional programs it might offer)
Post edited at 10:59