Can't see dvd files on computer

I have a SV2000 dual deck VHS/DVD burner recorder that I connected my audio/video inputs to and copied a recording from my 8mm camcorder. The DVD that I made plays on my DVD player mentioned above but will not play on another player in my house. I can’t even see the files on my computer. Also, I burned a copy of the DVD and it plays on the DVD player above but not on the computer or any other player in the house ??? Any ideas???