Suggestion re : example (Substitute a different one with ils..)

"Ils étaient meilleurs amis cette année-là."

I was confused initially as this lesson was to be devoted to regular verbs.  The conjugation of être is given in a later lesson an includes the same example copied above. To prevent confusion,  I suggest this particular example be removed from this lesson and also the video clip on être as there is another lesson devoted to this subject.