The tool is known as FakeApp, but the videos are usually called “Deepfakes” because that’s the handle used by the original developer on Reddit. You can download the code freely all over the internet, but it’s not easy to set up — you need to configure Nvidia’s CUDA framework to run the FakeApp TensorFlow code, so the app requires a GeForce GPU. The video you want to alter has to be split into individual frames, and you need a large number of high-resolution photos of the face you want to insert. In the case of Obama, there are plenty of photos online that can be used to generate a model.
https://www.extremetech.com/extreme/...bama-psa-video