We analyzed texture statistics in diffusion-generated video (like Sora) and found they exhibit distinct high-frequency characteristics that break classical reconstruction assumptions. Standard methods tend to over-smooth these regions, creating visible artifacts. We built an experimental testbed to observe this phenomenon: https://www.videowatermarkremove.com/remove-sora-watermark (mentioned in the article as a research interface). The post includes detailed zoom-in comparisons showing the texture mismatch.