SethBling

"Welcome back, Sethbling here."

Seth Henderson (born April 3, 1987), most commonly known as Sethbling is a Minecraft map maker on YouTube, and is also known as the "King of Redstone" for his complicated redstone creations. He started his channel on December 19 of 2006, making him one of the earliest YouTube channels, but only uploaded his first YouTube video on January 19, 2011. Almost everything posted on his channel are minecraft Mario games and they are mostly about redstone tutorials. He also posted some custom map gameplay such as Vechs' Race for Wool with some redstone friends like FVDisco, Etho, paulsoaresjr, and Element Animations. He has recently joined AviatorGaming's series called Bro Code after he won 5 rounds in a row on Nerd Wars and lost to RageGaming in the 6th episode Seth was on.

Minecraft Maps
Sethbling is famous for creating maps in vanilla Minecraft, as well as recreating popular games. He uses redstone, command blocks, scoreboards, and other techniques to create unique mechanics. All of his maps and builds can be viewed on his website. 

UHC
SethBling has participated in season 9 and season 12 and onward of Mindcrack's UHC. He participates in every UHC he can. He has won 3 seasons: seasons 12,13 and 22.