There are some videos around that want you to download a particular codec, but it appears the codec is a virus. So beware of those. Found it: http://www.gnutellaforums.com/downlo...ck-videos.html Research suggests those files should be left alone.

Using Bitzi is wise to check for user reports on them; How to use Bitzi Web Lookup. And this thread has some helpful tips Movie download issues (click on blue link)