"That's Harry, you fool" - The Video That Became a Gif That Became a Pic That Became a Legend

Long ago, in a tumblr far away, a screencap of this video/gif got posted by an Elounor shipper who mistakenly thought it was Louis and Eleanor and was going on about how sexy it was. 

"That's Harry, you fool" became the battle cry and the Larries swooped in to set the original poster straight so to speak. The entire thread is gold.