People are constantly complaining about downloading files and finding that they are not right thing after the download complete's.
here is a little tip for you PREVIEW the movie during the early stages of download and then you know if its the right file or not, this is how to do it:
In the traffic window right click the file you want to preview hover over Preview with and click AVI preview and as if by magic you can see the movie you are downloading.
Alternativly you can right click the task bar icon for kazaa lite hover over tools click avi preview and then open the file you wish to preview.
If for some reason you dont have AVI PREVIEW like your using some crappy file sharing client then get it here. AVI PREVIEW
NOTE: Do not try to preview a file when it is still less than 500Kb it will not open.