We like to document the first of anything, and in the modern era we often over-celebrate the first time something happens, since it might not last long enough for anyone to care. It wasn't always so, like the first Air Force One, which no one though worth preserving until many years later. It's even more difficult to document the last of anything when it disappears. Who could know that this guy was the last smallpox patient until years afterward? In other cases it's obvious, like the last flight of the Concorde or the last Woolworth's lunch counter, which was preserved for nostalgia. Even the twelve stories of "the last" things in this video might prove to be wrong, if someone decides to bring an elephant to a war zone, for example.
This is actually the second compilation that Weird History has done on the last of things; check out another video from a few months ago on the same subject with 13 different items.