No, it's upscaled. The cars have that distinctive smeary look, and the "text" on the road signs is nonsense.

I thought the opposite - the 'lost cat' sign at https://youtu.be/2UXS6DBD6g0?t=94 is incredibly legible and definitely better than an upscaled 1080p image.

Take a close look at the No Parking sign in the first two seconds.

Hehe NO PAURING you’re right the results are very inconsistent.

Also, I took this line in the description to mean that it was upscaled: "4K professional remaster and re-grade by Mat Van Rhoon from HD to UHD"