Plastering mud

Above is a short video of a person plastering their adobe house in Mozambique with mud. What has caught my attention about this video is how similar it is to how we plaster our homes here in the west. Another aspect of this construction i need to pay attention to is requirement of a un-even surface to plaster the mud onto. I know from my 3dd days that this is called (KEYING) the rough un-even surface allows the mud to better grip the structure.