moved avi's from Azureus folder, now they won't play?

I've downloaded some videos and when they were completed and after seeding, I moved the folder containing the avi's onto the desktop from the default Azureus directory (can't remember it now). When I open any of the files in WMP or BS, they say that it can't open or cannot play back the file, the format is not supported :unsure:

They're all avi's and fully complete :unsure:

n/m, deleted them :unsure: