Run structured experiments (e.g., thumbnail/title A/B testing, format tests, timing tests) to improve CTR, average view duration, audience retention, and session growth; analyze performance in YouTube Studio and related analytics tools; translate insights into clear programming decisions and creative feedback. You will partner closely with creative, brand, product, public relations, legal, and marketing teams to deliver content that is compelling, compliant, and designed to win in YouTube search, suggested, and Shorts feeds.