Green screening is when somebody stands in front of a green wall and acts something out. After that the editor would go into there chosen software and chroma key out the green background. 

Then the editor can make the background what they want it to be, could be a nice field or a restaurant or even explosions in the background. 

Our Green Screening

                      We made out own green screen videos based on some scenes from big blockbuster movies 
                                                                                           this is what we made