Question: What's the highest viewed video on youtube ever?
Disambiguated questions and answers: question: What's the name of highest viewed video on youtube ever?
What's the uploader of highest viewed video on youtube ever?
What's the view count of highest viewed video on youtube ever?
What's the upload date of highest viewed video on youtube ever?
answer: "Despacito"
Luis Fonsi featuring Daddy Yankee
6.68 billions
January 12, 2017
Natural Questions answer: Despacito (from the Wikipedia article "List of most viewed YouTube videos")