One of the best features of iPhone is that it is the best iPod Apple has created. iPhone has a memory of 8GB, which is more than enough to store multiple movies. So a lot of iPhone users are looking for methods to put their DVD movies on iPhone.
As a portable-device fans I usually enjoy my DVD movies and videos on my iPod/PSP/Zune/Zen…. In fact all these devices can only accepts special video formats. So I used to convert my DVD movies or videos to my portable-devices supported formats.