There are heaps of misnamed files on the network. Right click a search result > advanced > look up file with Bitzi.

Bitzi is a site where users can rate files. When you look up a file with Bitzi, you can see the ratings & get some idea of the file's content & quality. It's worth always checking video files with Bitzi (music doesn't get rated as often) to rule out fake & misnamed files If a file has heaps of sources but no Bitzi rating, chances are it's a fake. There's more info here.
How to use Bitzi