I suspect this will become a more-and-more common occurance as deep fake videos become more ubiquitous. There will have to be some mechanism to validate the origin of the video is truly from the content creator. If the video was created offline and uploaded after the fact, who knows if it's generated audio super-imposed over a deep fake?
In that case it's possible to generate a deepfake offline, then open the video in a player and record that. I doubt online-ness by itself will do anything if it's still just a video signal leaving the machine.
