translate English to French: Thinking he's having hallucinations about the people around him, and to help himself regain normal, banale objectivity, he starts filming them discreetly, like a thief, from the window of his squalid room.
Croyant qu'il a des hallucinations par rapport à son entourage et pour lui redonner sa banalité objective, il entreprend de le filmer, en cachette, comme un voleur, de la fenêtre de son taudis.