>>42969352It wasn't a popular thing until alpharad made one. People like him, so they enjoyed the video and the brand of humour he put into the video. Like
>>42969557 says, he has charisma and that made people watch it.
After his video was a success, every poketuber and their Drampa tried to cash in on the fad by making their own versions of the video. Notice how quickly the views start to drop after his video and the two most relevant ones (ha ha magikarp and ditto, something that's actually interesting) with the fourth result not even being a challenge video, it's more of a fad that caught on and will die out than something actually demanded by viewers.
