with DVD-R, you will be compatible with the majority of DVD home players in households, including old ones. It is seen as a DVD.
Nowadays however, latest DVD home players can read every format.
For movies to be played on DVD home players, it is effectively best compatibility to burn at a 4x speed. Writing strategies at higher speed will give some issues to some DVD home players.
Brands are no more too big of an issue nowadays, because the majority of them use the same process for production and chemicals (phtalocyanine).