Skip the software hacks and URL trickery. Film site Trailer Freaks offers up links for HD-quality downloads of trailers from Apple and Yahoo’s sites, along with relevant information links.
The site offers an RSS feed for true trailer addicts, and the basic service it provides works as advertised, with 480, 720, and 1080P links offered for most films, and the higher-end resolutions available for almost all of them. The layout, however, is in alphabetical chunks, requiring some Ctrl+F page searching or quick scrolling to find exactly what you’re looking for.
If you want to have film trailers available for viewing at your leisure, high-speed connection or not, Trailer Freaks is a smart place to stop.