from US News and World Report,
So it's illegal to copy a DVD? Interestingly, no. Judges have said that consumers have a right to copy a DVD for their own use—say, for backing it up to another disk or perhaps watching it on another device , such as an iPod. That's the same "fair use" rule that made it legal to tape television shows for watching later, perhaps on a different TV. The problem is that consumers can't duplicate DVDs without software tools that get around the copy protection on those disks. It is those tools that Congress outlawed.