Speedrunning Minecraft

[CakeWarrior]

Speedrunning is when a gamer - either through optimized gameplay techniques or through the exploitation of glitches - completes a game as fast as possible. Like if Usain Bolt decided to take his track skills to the arcade. Speedrunners practice for hours and hours in service to shaving milliseconds off their time or finding newer, faster ways to beat the game.
So how do speedrunners take a game like Minecraft and beat it in less time than it takes to make a cup of coffee? And why?
Watch the world record video it is hilarious