Kymeara
I've heard that yoga puts you in great shape. Is this a rumor or a fact?
You're probably not going to get ripped from yoga. But yoga can help you gain some strength and balance. It can help you reduce stress, stay limber, and reach or stay at a healthy body weight. So it certainly is good for you, even if the results are not immediate or obvious.
Kymeara
And what videos would you recommend? I would like to get some in order to practice in the dorm room; the class is only two nights a week (Tuesday and Thursday) and I have a lab on Thursday. Any suggestions?
I'd recommend checking out your college library, your local library, Netfix, or a health channel until you find something that works for you. Some videos are more about breathing, others about balance, others about stretching, others about almost impossible positions! So it really depends on what you want to focus on.
Personally, videos don't really do it for me. I have a hard time finding videos that match both my speed and interest. So I tend to get lazy and skip a lot of poses when I watch videos. I find yoga classes to be a lot more beneficial, especially if you have a friend with you or are in a small enough class that the teacher can give some amount of one on one.