Hi Lisa,
I agree with everyone, 'fat burning' is a ploy to sell more vhs/dvds! BUT it doesn't mean workouts with 'fat burning' in the title are not good. I have Crunch fat burning Yoga, too. I don't think it is the same type of program as a power yoga program would be. Power yoga I think, is a lot more muscularly powerful and difficult. I enjoy yoga routines such as the Crunch yoga series (Joy of Yoga, Fat burning Yoga and Candlelight Yoga) and some Yoga Zone's, Karen Voight and Kathy Smith. As you can see, I'm not full-on 'into' serious yoga, I like to use it to get the kinks out. You can find Power Yoga tapes by the likes of Baron Baptiste and Bryan Kest. Kathy smith also has New Yoga Challenge with Rod Stryker, who is a professional yoga guy (I guess that would make him a yogi). this qualifies as power yoga, I believe. I had the VHS once and knew it was not what I wanted!
Kathy