Bonjour,
I noticed that in the video attached above, sometimes du is used rather than de with retard, for example - J'ai eu du retard / Le train a du retard.
While in this lesson, it mentions that "avoir (5 minutes) de retard".
Is it when "avoir ... de retard" uses with no specific time, the "de" can change to "du" ?
Merci d'avance!
Tecla