Remember. A landlord can install special prepaid meters which allows them to set the price of units. For example, I'm renting out a flat on my property. And I've increased the price by R1.20 a unit. This R1.20 goes towards water and WiFi which they are sharing from my house.
So they are paying...
You can't connect the DVD player TO the decoder. The decoder has NO inputs. Only outputs. Youd connect the DVD and decoder OUTPUTS to your sound system. If your sound system only had 1 input. Then plug your DVD and decoder into your TV. Then take the sound out from your TV input your sound system.