A good total beginners ballet workout dvd?

I am not so good at aerobic exercise as I get discouraged and unmotivated and much prefer exercises that lengthen limbs and take balance and timing. I always loved ballet but know that it is too late for me to learn properly now but I thought it would be a good way to exercise each day and I know there are dvds that are full ballet workouts for beginners. Can anyone recommend a good one, preferably someone who knows a bit about ballet already? Thank you!