OK, forget the implications of low-cost and convincing fake video footage for nefarious purposes. "Fake videos"—e.g., CGI—have been around forever! I don't suddenly think Star Wars is real because I saw a video of it.

At the end of the day, what cool tech for legitimate purposes! Hollywood VFX, training video or PR customization, etc. Nixon giving this speech is a cool look into "what-if", without the moral burden of someone trying to convince me that an alternate reality is the real one.