This kind of software is trendy in filming industries and to be truthful, it is a necessity for them. It is almost impossible to shoot a scene of a movie on the exact location where it was planned in the real world. As some people have less budget for filming a movie. Or if you want to create a Skyfall scene or any heroic stunt in the film, to do this exactly as it should be in the real world by the law of physics, you need to be a millionaire or even a billionaire to do so. So for their ease, they use the green screen background. The reason is that this background can be swapped with any scene or picture from anywhere around the world and if the operator on the software is good, it will look like the person, in reality, is there. This lowers the cost of the movie and even reduces the risk of fatal injuries when actors perform stunts. This way, the green screen reduces cost and gives a high efficiency to the user. A list of software which will allow you to edit or broadcast green screen video is provided below. You can freely take a look and study the softwares in it and download whichever you like.