Manjaro is a Linux Distribution based on Arch Linux.
Today for the first i am installing the latest version 21 of Manjaro and you are welcome to watch and learn how to install it this video is more like a guide or tutorial on how to install it this is still under development, but an initial testing release is already available. which will very soon be released to the public as a stable version to download and install for everybody.
You will also need a empty USB flash drive and if you are on windows you can install Rufus portable from rufus.ie and create a bootable Manjaro installer USB with it watch the video for more.