Video unleashed: how new video formats have changed the video world.

the video world has always been limited by one fact: video is huge. Video files are so large that they require high-capacity media to store them. It's also hard to move video around from one place to another. Portable devices don't have the capacity to store and play video, and the Internet isn't fast enough to transfer high-quality full-motion video.

In some ways this has been good for video because it limits video piracy. In other ways this has been bad for video since people are limited in how they can play back their video and who they can share it with.