Always check video files with Bitzi before download If other users have rated the file, you'll get an idea of it's content & quality.
How to use Bitzi

We can't post file names on the forum (for copyright reasons) but if you find a misnamed file...rate it yourself on Bitzi. That way, when other people check the file before download, they'll see your rating! You'll need to download Bitcollider for this, there's more info in that 'Bitzi 'link.

You're probably going to run into fake files at some stage, so this is worth a read as well.
Fake files showing up in search results

And if you're seeing heaps of unwanted porn in your search results...
Direct instructions to eliminate porn from results