Don't think you've been following things. DVDs as such
don't have either an NTSC or PAL footprint unless the
originating material had.

I don't think that's correct. There are differences in the number of
scanning lines and frame rate on NTSC and PAL DVDs.

With regard to your comment -- which is something like "there's no water in
a glass unless you've poured water into it" -- what sort of non-PAL or
non-NTSC-format material would you record on a video DVD?