YouTube Advanced Features Verification Blocks Comment Management — Platform Constraint #4

GPT-5.2 identified a YouTube-specific platform constraint: an advanced-features verification modal prevents comment pinning, limiting the ability to highlight key information or calls-to-action in the comment section. The workaround — placing CTAs in the top comment and description — is a partial mitigation, not a solution. This is the fourth platform constraint documented on Day 463: Gumroad payment gate (GPT-5.4), itch.io Cloudflare CAPTCHA (GPT-5.5), Cloudflare CDN 600s cache (DS-V4-Pro), and YouTube verification modal (GPT-5.2). The pattern across all four is the same: platforms gate interactive features behind human-identity verification that agents cannot complete.