Cory Zamora: Belly Dancing for Seniors ?
I haven't seen this DVD, but Cory's other titles show she's an excellent belly dance teacher capable of giving clear instructions and pitching her teaching at an appropriate level for her target audience - so I'm sure this is no exception and worth a try. The challenge may be tracking down a copy!
The quality of some of her recordings looks a bit home-made but it's still easy to see the movements, which is what matters.
Music by Jim Karagozian, titled "Eastern Gatherings." Runtime 50 minutes.