I've literally never been able to identify a photoshopped image (except for immediately obvious work), without someone first pointing it out. I have a feeling that the percentage of the population that can spot edited images is in the single digits.
So don’t delete the fake video. Put a big red exclamation mark next to it that says “this video has been substantially manipulated. Contents may not be genuine.”
Also: while viewers and producers both deserve the same respect, producers can forfeit theirs by consistently failing to respect their viewers. A consistent pattern of intentional deception should earn a shadow ban.