Always check files from the search results with Bitzi:
How to use Bitzi
After downloading 5-10% of the file use the preview function to see if it is what you're looking for. If your media player has problems to view unrendered files you can use the free VLC player which comes with built-in codecs and can play almost all media files without any problems. However, you'll have to preview the file(s) directly out of the Incomplete folder rather than using the LW preview function.
http://www.videolan.org/vlc/ 