I don't think DVD burner choose - or +. It is you when you use -DVD or +DVD for burning.
I try playing some DVD on my DVD player/burner but player can't detact disk. I think the source is +DVD because my player burn -DVD. What I did was to copy the +DVD to a -DVD disk using my PC. It works.
You burn your DVD to watch on your player but does it work fine on your PC? Some folks don;t know this but..if you don't close your DVD after your recording...meaning you left it open ended after your recording so you can add more data or movies...only your PC that recorded it can read it. But put it in a normal movie DVD player and it will not read it.