How Minecraft redstone computers work

I know that many people who have seen youtube videos of computers made in Minecraft probably have no clue how these computers work. When I saw a computer in Minecraft for the first time, I was very curious as to how it worked however all information that I could find was simply too complicated. Hopefully, after watching this video, you guys have a better understanding of how these computers work.
A download for the world file in the video can be found here:
www.mediafire.c...
By: SkupItUp