Create Software to use custom image/video as Android hardware camera input

Similarly to this video: [login to view URL] I need to be able to use custom image/video as Android hardware camera front/back input. This video shows the main idea on an emulator. What is required is the same but for real phones. When I will open any 3rd party app that request to take a picture, the custom image/video will be displayed and taken as if it was a new picture taken. Android/Virtual video device