Everything with getting a program together is so dependent upon the person, you kinda have to work it out for yourself.
Some things you can try is to (1) alternate walking weeks with dvd weeks giving you 1 or 2 days rest each week, or (2) alternating dvd days with walking days and rest days - so you would dvd day 1, walk day 2, rest day 3, dvd day 4, walk day 5, rest day 6, etc.
Try a different variation every 2 weeks to see what works best for you. Remember that as the months go by you'll probably change things up anyway. Don't get too caught up on perfection with this stuff, you just want to get going with it.
Nothing needs fixing