[Ballu]

Top comment on youtube (makes sense, how lively this scene came out):

"Interesting thing to note: in the Casablanca script for this scene, NONE of those actors were given the cue to cry. Due to the fact that this was being filmed whilst France was occupied by Germany in the war, and coupled with the fact that a lot of these extras were French or from French territories, a lot of them swelled up with emotion during the song and started crying spontaneously. Those tears that you see on their faces, my friends, are truly genuine! That's why this has always been my favourite scene!"

[hueyluey]

German occupies (French occupies Morroco)