Streambox VCR!
This program works great! It's no longer supported by the author (and now for the best part) ...because of legal difficulties with Realnetworks, Inc. ...the fine folks that brought us Real Player! It's illegal to use this program in the U.S., so you may have to move abroad ...or better yet get a broad to move you! I found this program about 2 1/2 years ago here, thanks to a fellow AnAndTecher.
For Quicktime movie trailers you typically have to select the item from your temp internet files, right click on it, select properties and copy the shortcut path from there ...then paste it in Streambox VCR! and download.
Used to be you could just right click and select "copy shortcut" from the link on the web page ...and on other sites it still works that way. If you find that you're not copying the correct shortcut, just click the link to start opening it ...then stop it and go to your temp internet cache and locate the item there ...right click on the item and select properties ...copy and paste the shortcut from there.