I agree, the improved version is worse. At first glance, it looks better than the original, but then numerous artifacts become apparent. For example, check out the little girl's face. It's jumbled in the "improved" version, but very clear in the original.

It looks like most of the perceived improvement comes simply from the upgrade to 60fps, which is achieved trivially through interpolation.

I wonder if the video would have gotten as much attention had AI not been mentioned.