Well, I could never learn to dance from videos. Maybe if you are very talented at observing movement and imitating it you could learn some things, but I'd recommend taking in-person classes or lessons.
Do you have a partner to practice with? The main thing about ballroom is that it's moving with a partner. You need to start getting the feel of that from day 1. You'd be doing yourself a disservice if you tried to learn just your own part. You'd have to unlearn all you learned about moving just by youself and re-learn what it feels like to move with a partner.
I watched a few of the sample lessons, and I have two main criticisms (compared to other dance videos I've seen). First, they really don't give you much information about what you should be doing, so if you don't understand just by watching them, you're out of luck.
The other thing is that, especially with the latin dances (Corky's specialty), the demonstrations include a ton of technique and styling--foot shaping, cuban motion, arm styling, and so on--that are usually taught separately later in the learning process. I doubt most beginners could do most of what is shown and would be quickly frustrated if they tried.
To compare to other dance videos, go to dancevision.com. They have tons of videos, and you can preview clips of some of them. (Of course, they cost a bit more than $2.00.)
I prefer dancing in actual reality.
