How do deepfakes work Face Swapping and Facial Manipulation ?

Artificial intelligence (AI) and machine learning (ML) is providing the innovative technology to develop various automated models, system, applications and machines for various fields. But few people take advantage of such technology and misuse for fun or to gain popularity or take revenge from others. Deepfake is the invention of some wicked minded people who use AI to create the fake videos of celebrities and popular personalities. And, now it is mainly used in pornographic industry to show the face of popular actress on adult stars to gain the number of views on adults or malicious websites. Though, Deep fake is also created in revenge to defame the personality of the popular person.