Pixelated Colors

[hdjv]

Thanks for the replies, here's some more info.

The host OS is Windows 11.

Here is the media info for the file.

   

Here are the logs the appeared when watching back that scene.

           

GPU is a GTX 1660 Super. (I know, not an amazing card, but again I thought it should be good enough.)

As an experiment, I downloaded the 1080p version of the movie and the issue was still present, but at a much less extreme scale. Instead of giant blocks, the picture was just a little more noisy in those areas, which is what I would've expected.

Reference:
       

Thanks again for any help. I apologize for my lack of understanding.