LG LRH-780 - Dubbing from HDD to DVD

I have dubbed a from HDD to DVD but can not watch the DVD on other DVD players. I have the feeling it has to do with “finalizing” but not totally sure. The process I have gone through now is:

  1. put dvd in and the machine initializes it
  2. dub the video from HHD to DVD
  3. finalize the dvd

other questions:
> does it matter what kind of DVD I use?
> what settings (speed) should I dub at?

Any help is greatly appreciated.

Many thanks