Does the DVD player have ports marked s/pdif or toslink/optical?
Y: check whether the amp has the same port(s) for input & connect accordingly.
N: Do you have L+R out on the DVD player?
Y: connect to a L+R input of amp (not phono).
N: does your TV have L+R output?
Y: connect to a L+R input of amp (not phono).
N: You can only use TV sound.

If you really got to the last line (nearly impossible) you should get a different DVD player.