The video likely worked due to its dark humor and unexpected twist on a common wish. The punchline is absurd and memorable, playing on the literal interpretation of 'smartest person on Earth' in a morbidly funny way.
Summary
The creator humorously grants a viewer's wish to be the smartest person on Earth by stating that everyone else has died. This implies that being the smartest is only possible in a world devoid of other intelligent beings.
Structure
1Creator introduces the concept of granting wishes technically.
2Viewer's wish to be the smartest person on Earth is displayed.
3Creator grants the wish.
4Creator explains the technicality: everyone else died.
5Creator wishes the viewer 'have fun with that'.
On-screen text
"Technically" granting
YOUR wishes
Transcript
Technically granting YOUR wishes
I wish to be the smartest person on earth
I wish to be the smartest person on earth
Okay
You are now the smartest person on earth
But that's because everybody else died
Have fun with that