i finally cracked long-form AI ads with GPT-6 Astra... my setup now produces 5min+ videos on autopilot in 4k 60fps, here's how it works (running inside Codex): - it starts in the meta ads library, pulling the winning ads in the niche before writing a single line - from that research it writes the full script, every scene mapped before anything generates - image models handle the character and environment sheets - video models handle the actual sequences - Suno generates the soundtrack to sit…