This chapter presents a course of FFL (French as a Foreign Language) didactics, designed by the author, and given online-from September to December 2020-for two different types of second-year university students from Université de Caen Normandie (France): distance learning students due to COVID-19, and distance learning students by choice. It aims at identifying the levers and obstacles to the success of an online course through the observation of these two cases and the feedback received from the students. A comparative analysis shows the differences in the perceived effectiveness of this course according to its student audiences and highlights a difference in the way these two audiences were able to engage with the proposed communication scenario which was integrated in the pedagogical scenario.