Complex sentence: They played two underground concerts in Tehran together with another Iranian band, the Free Keys, and performed in Bahman Ghobadi's film, "No One Knows About Persian Cats", before fleeing Iran.
Split into simpler sentences: They played two underground concerts in Tehran together with another Iranian band, the Free Keys. And they also appeared and performed their music in Bahman Ghobadi's film, "No One Knows About Persian Cats", before fleeing Iran.