Say the black, do the red is a phrase that is perhaps the key to understanding what the “reform of the reform” means. Basically, in the Missal the ‘black’ texts refers to the words, the ‘red’ to postures or actions - so the priest must do exactly what is in the rubrics and not do his own thing. Make sense?
Ordinary Form - Mass that has some vernacular (must retain Latin though, according to VII), is most common in the world today, the Mass of Pope Paul VI
Extraordinary Form - Latin Mass of the 1962 Missal