Explanation
This is the area where AI video creates genuine legal exposure rather than platform risk. A generated presenter who does not resemble anyone real is unproblematic; a generated presenter who resembles a specific person, living or recently dead, is a publicity-rights matter in most jurisdictions and increasingly a criminal one where the content is sexual or fraudulent.
Voice is covered as well as face in a growing number of places, and the direction of travel across the US, EU and UK is towards more protection rather than less. Consent has to be specific: permission to film someone is not permission to synthesise them.
The common mistake
Assuming a public figure is fair game. Public figures generally have stronger publicity rights, not weaker ones, because their likeness has demonstrable commercial value.