You can create the tutorial in any format. If written content is your main weapon, then create an article or blog; if you excel in front of the camera, then make a walk-through video; if you’re a talented graphic designer, then you can make a GIF.
There’s no limit on what form of content you can create to explain how you used 2key to make your own token. If you happen to have a live audience, then you can even host a live walk-through + possibly even an AMA where you explain the details to everyone.