"Another one that I think of right off the bat is Leslie Sansome she has a variety of walking-based videos that you do inside right in front of the tv. I have one where you can do 1, 2 or 3 miles and there is also a separate leg workout that you can add on.
Do you have Netflix or access to a local library? I would suggest checking there for videos and trying them out first to make sure they'll work for you rather than buying them. "
I've read a lot about those walking videos here on sp. So decided to check them out.
Just adding that, you don't need netflix or a treck to the library (even if a treck to the library for other purposes are always recommended) you just need an internet connection if you want to try those out before you buy.
The beginner 15 minute video (and a couple more) is available free on the site at: www.walkathome.com/try-walk-at-home/