5. Optimizing for Recommendation: CTR and AVD

For your discovery-driven content, the title and thumbnail are not just metadata; they are the entire marketing campaign. Your goal is to create a combination so compelling that a stranger, seeing it on their homepage, feels an irresistible urge to click. The title should create curiosity (e.g., "I Turned My Microwave Into a Drum Machine"), and the thumbnail should be a high-contrast, emotionally resonant image that visually supports the title's premise. Once a user clicks, the video's job is to hold their attention for as long as possible, maximizing the Average View Duration. A high CTR followed by a high AVD is the ultimate signal to the Recommendation Engine to push your video out to millions.