Participatory Certainty and Myth-Making in Platformed Geopolitics: A Digital Ethnography of Iran-Collapse Discourse on YouTube

This paper presents a digital ethnographic analysis of a highly viral YouTube livestream and its associated comment ecology that framed contemporary unrest in Iran as an imminent and inevitable regime collapse. Rather than adjudicating the factual accuracy of the claims, the study examines how geopolitical certainty is collaboratively produced through influencer narration, meme-driven affect, diasporic testimony, and epistemic insulation practices. Drawing on interpretive digital ethnography and platform studies, the analysis introduces the concept of participatory certainty: a collective belief state stabilized by repetition, moral compression, humor, and identity signaling rather than empirical verification. The comment section is treated as a belief-stabilizing infrastructure in which speculative claims harden into perceived reality through interactional reinforcement. The paper argues that contemporary geopolitical understanding on social platforms is increasingly experienced not as an open question but as a story already decided. The work contributes to media studies, digital ethnography, and political communication by demonstrating how platforms actively scaffold conviction and how participatory myth-making reshapes public encounters with global events.