A
practical joke. There are the pranksters and the victims, the idea of pranks are to make people laugh, In some cases, even the victim (The good type).
Pranks are common on YouTube, they gain controversy which is usually the
YouTuber's intention. More Controversy = More Views = More revenue.
This is, like many, a word that has lost its meaning through the years and has gotten worse and worse.
Silly -> Slight Inconvenience -> Bullying -> "
Social Experiment".