I've done a couple of other Richard Simmons' exercise videos (Dance Your Pants Off and Sweating to the Oldies 2), and Disco Sweat is my favorite. The moves are the most fun in this video, and Simmons is really on fire here, at his over-the-top, funny, campy, and inspirational best.
The video alternates between low-intensity and high-intensity aerobics segments, and contains, at the end, a long set of crunches (which I must admit I usually skip). There are also substantial warm-up and cool-down segments, along with, at the very end, a section that Simmons puts on all his exercise videos, where the participants dance one-by-one while the amount of weight they have lost (which, in some cases, is in the triple digits) flashes on the screen.
There is some cute stuff in the beginning where Simmons struts down the street like John Travolta in "Saturday Night Fever, " and everyone greets him in heavy Brooklyn accents. It's a bit disconcerting, though, to see that the opening shot contains the Twin Towers (the video was obviously shot before 9/11).
I think this is a good video for all levels of exercisers. You can modify it for your level of fitness by choosing to do more or fewer segments. Simmons, in this video, is really intent on boosting the self-esteem of his audience, and doing the video makes me feel good not only physically, but also emotionally.