I need to start alleviating the stress in my life and would like to start HATHA YOGA as Dr. D suggests.

Does anyone have a great suggestion for a link to an instructional DVD?

I suggest if you are just starting out that you go to a class, since an instructor can provide valuable guidance:

I recommend:

http://www.yogainmind.com/

Also in Kenosha:

http://www.myyogafriends.com/

As far as videos, Rodney Yee has some good ones.  You need to start with beginning yoga, very gentle.  People can get hurt trying to do what their extremely flexible/strong teachers are demonstrating.  It's important to pay close attention to your own body and honor it's capacity.  

After teaching hatha yoga for 20 years, I still occasionally injured my body when I would attend other teachers' classes.  Because I am flexible, I would sometimes do something that I was capable of, but should not have gone into the poses that far.

I agree with C_sharp that real-life classes are the best way to learn the poses correctly and get a good introduction.  (Just be careful and pay attention.)