A hands-on guide to fixing and upscaling AI-generated video from Sora, Kling, Veo, and Seedance. Covers why AI clips look soft, waxy, and stuck at 720p, the six defects every AI video has, and the correct repair order — clean structure, restore texture, deflicker, then upscale to 4K last. Includes a symptom-to-fix table, a step-by-step UniFab walkthrough, per-model tips, an honest tool comparison, and a 10-question FAQ.