我刚又把这AI视频上传给Gemini，问它这是真实视频还是AI视频。它说是真实视频。这是它的原话：

Based on the visual characteristics and the nature of the content in the video, it appears to be a genuine video captured with a camera, not an AI-generated one.

Here are some observations that support this:

• Natural Lighting and Shadows: The lighting is consistent with a sunny outdoor environment, and the shadows cast by the people and dogs are sharp and follow the perspective correctly. AI generation can sometimes struggle with consistent, realistic shadows, though this is improving.

• Realistic Movement: The movement of the people (the woman walking, the man running) and the dogs is fluid and natural, without the subtle "uncanny valley" effect or distortions that can sometimes be present in AI-generated videos, especially with complex subjects like animals.

• Camera Focus and Depth of Field: The video has a relatively shallow depth of field, with the subjects in focus and the background slightly blurred (bokeh), which is a characteristic of footage shot with a standard camera lens.

• Lack of AI Artifacts: There are no obvious signs of common AI generation artifacts like blurring, inconsistent textures, or distortions in areas like faces, hands, or the environment.