Maybe you avoided shock videos? It has been a quite common shock video on the Internet for the longest time, though I guess in more recent times it's relatively tame compared to the rest.
It was very common to stumble over it in the mid and late 2000s at least, and into the 2010s.
Personally I only know of this whole thing because of someone sending me that video way back when, and my curiosity made me look it up.
This is quite cool, but I see nothing on how the choice of cities to include was done?
In my case my city isn't included, and the nearest city that is, is over 100km away on the other side of a mountain. The next one is about 500km away.
I also see plenty of smaller cities here in Norway than mine that are included, so this makes me think the selection of cities was probably made based on largest city within x radius. Would be neat to know how these selections were made.