You can't really spot deepfakes in rigged simple setups like portraits on a white background. Computer algos are very good at making solutions to very specific problems.

Deepfakes aren't a threat until they can make video that even experts can't tell is fake, and even then, the main threat will be in manipulated audio, not video, such as taking a politician and having them say "nigger" when they didn't actually say it, or something like Trump's "grab em by the pussy" audio.