DVDs or Youtube workouts for the "mature" woman?

I just turned 50 and I love Jillian Michael's 30 Day Shred. 20 minute workouts with 3 levels - beginner, intermediate, advanced. Each level shows a woman doing the modified version in case it is too hard for you. All you need is a floor matt, some hand-held weights (I use 3 pound weights), and a little bit of room to move.
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If that seems too intense, I heard that Jane Fonda has a workout series for seniors. And lets face it, she looks amazing!

I'm 50 and pretty fit (but no "athlete" by any means), having used weights since I was a teen. I fully agree with DaneanP - I have only just recently discovered Jillian Michael and I also enjoy her 30 Day Shred. It is intense and would recommend you just do it at your own pace and not worry about doing one level per week. I did Level 1 for 2-3 weeks before moving up to Level 2, just to be REALLY comfortable with the moves. I consider it more of a "90 Day Shred" If you are a beginner, consider trying without hand weights for a little while, just to get the hang of it and avoid injury.

I used to enjoy Kathy Smith's "Lift Weights to Lose Weight" DVD. I still pull it out from time to time. It will get you familiar with using hand weights, lunging, etc. She does not combine cardio moves with the weight lifting, so it is easier. As much as I loved this video, there are likely more contemporary instruction series that could be more useful to you.

Conclusion: I recommend that you search the web for Jillian's workouts - some of them are freely available online. That is how I found her - I tried her online workouts a couple of times, then decided to purchase my own DVD. (And it was not expensive at all at Walmart!) Do what you can and do not be discouraged or intimidated, as you will get stronger. Then you can add a little weight and do it all over again! Good luck! You can and will do it!

Jessica Smith. Look for low impact especially. (Even her walking routines will incorporate a little strength, enough to ease you in.)

Yoga. I like Yoga with Adriene. She has a beginner video and like, a super beginner video (can't remember the names). She also does foundations videos, where she spends a LOT of time teaching you all the things about a pose, including modifications. So if you do a video of hers, and she asks you to do something you're intimidated by or don't understand, you can try the foundation video. (Though she is usually good to give some instructions and modifications in any video.)

I would also suggest keeping an open mind. I think often we think of age, and fitness level, and "bad knees", and body fat, as huge obstacles. When actually, it is more our thoughts and feelings that keep us from working around or with those things. Don't be afraid to try anything that looks fun to you. If you see something you can't do, modify it, or substitute (do squats while they do burpees, say). Go at your own pace. And when you're starting, all of the encouragements in the video to never ever ever take a break don't really apply. Do push yourself, but yeah, actually, starting out, you likely will not be able to do every single rep in every single set. You're supposed to be working up to it. So don't get discouraged and think "well I'm old/fat/unfit/whatever". Do what you can, repeat, and you'll get stronger and stronger.