Sometimes when using Video Enhance AI you may notice what appears to be a color shift in your preview. You may also see this in your output if you are using an image output. It may look darker or lighter depending on the input colorspace. This will not affect your output, rather it is a byproduct of Video Enhance AI preserving your original color space.
Video Enhance AI does NOT change the pixel color value at all (except to enhance the quality). So the downstream processing needs to interpret the color space as the INPUT video colorspace to get the correct color.
For example, if your input video has HDR bt2020 colorspace and you run it through Video Enhance AI ad output a 16bit TIFF, your output will look dark because the image viewer will interpret the tiff as sRGB (but the pixel value in tiff is still actually in bt2020 colorspace). So when you import the tiff sequence into your After Effects or other programs, you MUST set the tiff's colorspace as bt2020 to get the correct color handling.
For the same reason, the preview in Video Enhance AI may also look dark as the preview is not color-managed.