We study how the intensity of observability and the possibility of ex post feedback affect prosocial behavior. In an online experiment, we implement a one-shot dictator game with a passive third-party observer and systematically vary observability: the observer sees only the decision, sees the decision together with a photo of the decision maker, or sees the decision and meets the decision maker in a brief silent live video call after the decision. We further vary whether the observer can provide structured feedback after the decision. We find that making decisions observable increases generosity relative to a dictator game without an observer. Absent feedback, increasing observability intensity from decision visibility to photo or live video does not further affect giving. In contrast, when feedback is possible, observability intensity matters: photo and video exposure combined with feedback significantly increase transfers, with the strongest effects under live video. Decomposition shows that observability without feedback mainly affects the extensive margin of giving, whereas observability with feedback increases both the likelihood of giving and the amount given.