The video shows how to use the Fury Survivor: Pixel Z - LUA scripts. The script is simple to use, just remember that you have to find the item, then click on the hack you wish to perform: amount hack or type swapping.
Note: Item type swapping will only work after restarting the game. Once the script told you that the hack is completed, you have to make any changes to your backpack, such as consume a medic, consume a food or drinks, equip or unequip an equipment, etc. Item type swap will not take any effect if failed to perform the mentioned steps.