A couple of trailers converted using the iPhone profile in DVD Catalyst 3.
Download the file, extract the video from the zip file you downloaded, then transfer the video to your iPhone using iTunes. DVD Catalyst is Windows-only, however, the videos will play/transfer using a MAC

DVD Catalyst Free
build 1.7

Convert DVD to your iPod, your iPhone, Pocket PC, PSP, Droid, Nexus One or Zune for free. DVD Catalyst Free is the ONLY free 1-click DVD conversion utility available, and enables you to create video files for your portable devices without the need to read through complicated guides or to install a [...]

DVD Catalyst 3

Faster, easier and more features than ever before
Watch a DVD on your iPod, iPhone, Pocket PC, Zen, Zune or any other video-capable device with one click.
DVD Catalyst 3 is the most advanced, feature-rich DVD conversion tool on the market today, and besides the standard features found in similar products, it offers [...]

The first beta version is available for registered users.
DVD Catalyst 3.82, the next version of DVD Catalyst 3 is currently available in beta form.
While most things are fully functional, there might be some issues.
Whats new:
To clean things up a little, 2 new TABs have been added in Global Settings.
*Boosterpack TAB, containing the settings for turning [...]

Because DVD Catalyst uses the opensource mplayer/mencoder tools for it’s conversion engine it can read and create a huge number of video formats.

DVD Catalyst 3
Build 3.84

Convert DVD to your iPod, your iPhone, Pocket PC, Zen, Zune and more in a breeze. DVD Catalyst is the most advanced, feature-rich DVD conversion tool on the market today, and besides the standard features found in similar products, it offers numerous inductry-unique features to make it as easy to use as [...]

The “Add” menu item in DVD Catalyst provides a quick way to add additional content to DVD Catalyst to convert.

Unbelievable Product!
by Frank   [...]

It’s always been possible to cobble together a couple of free, open source tools to rip and compress DVDs into playable files on the Treo. Video clips like mpeg, avi and mp4 files will often play on the Treo with nothing more than the free TCPMP player and its codecs.

One of the most popular portable devices on the market today for video playback is Apple’s iPhone. To get the most out of your iPhone video viewing experience, we decided to provide some specific information to optimize your video to fit your needs.

This How to will show how easy it is to start watching your own movies on your iPod Touch