See whether anything here helps:
http://www.gnutellaforums.com/gettin...h-results.html
mov files are notorious for porn/spam - it's probably a good idea to filter those out. If there are keywords that you always see with junk files (eg hilarious, awesome), you could filter those out. Check this thread for more info - there's a list of keywords & file types to add to the filter:
http://www.gnutellaforums.com/limewi...ind-music.html