"It's the fact that within a year, it will start loosing data."
Can you explain what you mean? Even bad media should keep for 10 years (IMO). They'd like to say it will last 100.
What are you playing these movies in?
If you are having skipping issues when playing, maybe it's your DVD player. I have a $40 one and it likes to skip all the time. Even when the movie is a good copy.
It shouldn't matter if it only lasts 1 year, you have the original right? You can just make another backup.