For all those who were searching for an easy way to watch Apple's movie trailers right on tablet (apple.com/trailers), there's an old method based on Yahoo Pipes mashup web application.
You may get an RSS feed from this page which contains links to a movie's page on Apple site, film's description and - the most important part - the link to its trailer in Ipod format as enclosure, that's played back by default Media player beautifully (however not Mplayer). Just go to the page with your tablet browser and send the RSS to feed reader. Links to trailers are under each item's description, and they are saveable.