Sometimes you have to stick with a winner, and even though Beryl Bender BIrch's Power Yoga: The Practice DVD came out in 2002, it illustrates Ashtanga Yoga's Primary Series beautifully. Since this series of poses never changes, this DVD is timeless.
It illustrates the poses of Primary Series just like David Swenson's Primary Series DVD, but what I love about this video is that the instructor is a woman. You won't just see her on a mat perfectly demonstrating the poses on some pristine mountainside or meadow either. The video is filmed as she instructs a class of students with all different body types and levels of flexibility and strength. That way you can see modifications for all the poses.
I had the honor of taking her Power Yoga Workshop many years ago, and Beryl's personality is so warm, kind, and supportive. She realizes that Primary Series is difficult, so she encourages you to listen to your own body and not push yourself too hard. I love that she realizes that practicing yoga is all about becoming aware and open, and not so much about how deeply you can forward bend. I'd recommend this DVD to beginner's and advanced Ashtanga yogis.
The entire practice is 90 minutes long, but you can do as much as you want. I like to pop it in when I can't make it to a class, or if I need to stretch after a run. I also like to bring it along with my laptop when I go on trips. Now I have no excuse to forgo exercise while I'm away from home. Order it from Amazon for $13.99.