[ezoe]

I don't know, for this type of fake video, you don't even need a face mapping or a voice mapping implemented by deep learning.

Just take any random Barack Obama video which we have plenty of, use similar male voice, or copy&paste convenient Obama's voice without context, and some people believe it.

It won't fool everybody but that is not that important. Some people still believe it and act accordingly(Pizzagate conspiracy theory) and that's more than enough to achieve the malicious intent.