I'm a home exercise veteran, so I have a bunch of videos I like. You can check out the whole world of video exercise here:

www.videofitness.com

Some easy favorites of mine:
Leslie Sansone--any of her walking videos.
Rebounding--I use a cheap rebounder from Wal-mart, and get a great workout without heavy pounding. I use some audio walking tapes with Motown music at about 145 bpm. Choose your own beats!

I love to ice skate--outdoors in winter, indoors in summer. But that requires an investment in lessons and equipment if you don't want to hurt yourself