It's not less intense, but it's less time consuming. HiiT training can be done with or without a dvd, just use a mix of music. cathe friedrich has a really good HiiT dvd. It has 3 workouts- 30/30, 40/20, and wave pyramid. you can watch clips of these or any of her workouts on her website or utube. you can also buy the individual workouts as downloads. these cost $8 each and can be used with the workout blender, if you decided to buy several. they are all on sale now, because they just came out with the workout blender.
anyway, what i did, since i can't afford the dvd for now. is write down some of the exercises she does in the workouts. then use a timer, or a mix of music (a min. or less per song) and go all out for maybe 20 mins.
have you tried belly dancing? that can be fun for days when you want the less intense, or are tired.
or weight training. that's the original time saver w/o. easily done in 15 or less.