Unless you are in CA, NH, HI and MA, you don't have 2 years to rent the DVD, you only have 1 year(52 consecutive weeks) once you start. The 2 years provision gives you the ability to start renting in a year, but once you start, you can't skipped a week or it will be forfeited.
"Any week(s) skipped cannot be later redeemed, shall be forfeited and cannot be accumulated for redemption at a later date. "
This is still a good deal as the DVD player alone cost around $100.