Well, if it is a very popular movie or a recent new release, then I can well be that a lot of jerks jump on it to use the title to get people downloading crap, viruses, trojans or some kiddy porns.
The most reliable way is by using Bitzi, and yes, it can sometimes be like the search for the needle in the haystack.
But since the new LW versions comes with torrent support, why not trying to find that particular file via torrent?
Cheers