Yoga dvd's can be great but if you are a beginner I would highly recommend you going to lessons with a good yoga teacher or you can easily easily be doing postures incorrectly without any knowledge...I am a yoga teacher and have been practising for 12 years...Not only could you hurt yourself, but you are not gaining the full benefits if practising incorrectly.
I'm a tv junkie so I got into yoga first when I bought Body by Bethenny, in which Kristin McGee instructs as Bethenny Frankel, RHONYC Alum, follows along.
I will say that this DVD has nice camera angles and is easy to follow along with, but Kristen talking with Bethenny on and off is both a blessing and a curse. It's a blessing in that you are distracted (in a good way!) while you're holding poses, but at the same time, some of the same poses are held longer on one side of the body than the other because they are chit chatting. Some days it annoys me, others it doesn't--but I guess I'd like my workout to be a litle more even! It's still a nice advanced beginner dvd I think, nothing too intense. Anyway, I found the DVD to be a little too advanced as novice-- I should have started somewhere else, but I've used the DVD enough that I've gotten the hang of it and am getting something out of my workouts.
I also tried to follow along with a few different Gaiam workouts on Hulu that are free to watch--some of those were simple and a good beginning point for me. There is one in particular that is sort of an athletic-based yoga that is excellent for true novices as it gets you used to yoga poses and yoga-like stretches without the lingo. A half moon is sort of my goal-pose to be able to do right now without a block, but I'm trying to stay away from anything too advanced until I can.
I've just bought Rodney Yee's Yoga For Beginners so I can try to correct and relearn poses and be sure I'm doing things right before moving on to anything too advanced. I notice some joint pain when I'm doing poses on one day vs. another, and I think that might be attributed to those little corrections I need. I'm hoping this DVD helps with those problems.
I also just recieved Kristin McGee's Power Yoga as an Xmas gift, and am hoping to get into that after I work with Rodney a bit. I'll report back and will let you know how they work out! :)
I'm a fan of DDP Yoga myself. It's by former pro wrestlers "Diamond" Dallas Page. In the late 90's he badly injured his back and used yoga to rehab and managed to avoid surgery in the progress. Since then he's developed his own program over at DPPYoga.com. He is also big into nutrition as well and encourages everyone to avoid milk and diary, gultin, and processed foods. If you wanting to get guy to try out yoga, try DDP Yoga. Once they see Pro Wrestlers and MMA fighters doing it, they'll probably get over any mental blocks they have towards yoga. Rob Van Dam, Chris Jericho, Shawn Michaels and Justin McCulley are among a few of the athletes that do DDP Yoga.
I bought a couple of yoga DVDs from Amazon. They are all pretty cheezy except for YogaWorks Body Slim. But like another user posted, I joined Yogaglo 3 months ago. It is way better than any DVD as long as you have internet access. In 3 months I haven't had to repeat any classes b/c there are so many to choose from. I blogged about it if you care to read my review. But basically, I love it!