What requirement must a video meet before it’s eligible to earn ad revenue?

For a video to be eligible for ad revenue on YouTube, its content must adhere to YouTube's advertiser-friendly content guidelines. This means the content should be suitable for a broad audience and free from elements like excessive violence, sexually suggestive material, hate speech, or drug-related content. Advertisers prefer to associate their brands with appropriate content. The other options are incorrect: There is no specific minimum length requirement like 30 seconds for ad eligibility; videos of varying lengths can earn revenue. A channel's age (e.g., 1 year old) is not a direct requirement for individual video monetization, though new channels must meet other eligibility criteria like subscriber and watch time thresholds. While copyright ownership is crucial, the requirement is for 100% ownership or proper licensing of all content, not just 50%.