In this tutorial you will learn how to do three things:
1. Create a player location common event
2. Create a slightly modified tile sheet and use it in an event
3. Create an item tied to a common event that allows you to freeze any water in your game to make an ice bridge.
I forgot to mention that you must go into the tileset editor and change the passibility settings for the ice tile you create, to allow your character to walk on the ice.
Also in the video I say to set it to the terrian tag, but it should be region id instead.