Honey, I'm sorry you're disappointed, but you are expecting one on one instruction based on your own learning curve from a dvd made for the general public. You are also giving up too easily. Learning to dance is not all that simple even with private classes and a live teacher. You've set yourself a more than usually difficult task but you can make progress once you accept the situation for what it is and deal with it accordingly. Dry your tears, straighten your hip scarf, and let's figure this out.
Here are my best suggestions for following a dvd.
1) Watch the dvd from beginning to end without trying to physically follow the instructions.
2) Set yourself to learn the individual movements one at a time instead of, for example, trying to do the entire warm up from beginning to end.
a) Watch one movement within the warm-up.
b) Stop the dvd. Reverse it.
c) Watch the movement again. Reverse it the dvd.
d) Watch the movement again.
3) When you've done the above enough to have the movement in your head, stop the dvd and practice the movement while watching yourself in the mirror.
4) Return to the dvd, watch the teacher, note what she does differently from you. Stop the dvd.
5) Practice in front of the mirror again.
6) Repeat until what you do looks like what she does.
7) Go to the next movement.
Oh, yeah. That's slow and it's hard and there is no one to tell you what you are doing wrong. But if you are convinced that classes are beyond you and you can't afford private lessons, then your best bet is to be patient and diligent, plan on spending as much time on each movement as you need, and don't give up whenever results are not in keeping with your expectations.