If your TV also has a coaxial cable connection, you can use that for 1 of the devices.
You can't connect a DVD to the MTS box, however you can connect 2 devices to the 1 set of inputs on your TV.
If your TV has a set of RCA connectors (red and white audio and yellow for video), you can buy 3 RCA Y-connectors and connect both devices to those connectors and then to the TV.