A still frame hides problems that only appear over time. When a generated clip plays, small regions can warp or drift from frame to frame, faces and objects can subtly morph, and background detail that should be fixed can shimmer or change shape. Blinking and lip sync are also frequent failures: eyes may not blink at a natural rate, or the mouth may not match the sounds. A real clip of the same scene stays stable across frames, which is why comparing the two side by side makes the instability obvious.
Spotting AI-Generated Images and Videos