Blocky artifacts are the result of poor bitrates. In streaming services it’s due to over compressing the stream, which is why you see it when part of a scene is still or during dark scenes. It’s due to the service cheaping out and sending UHD video at 720p bitrates.

The only town I saw in that area in my 5 second search is Jordan, with a population of 357 356.

Edit: corrected population, my bad