With the rise of AI, all audio, images and video is now also suspect.

True, but it's a lot harder to sneak those things than text. I've seen convincing Yanis Varifakis and Neil DeGrasse Tyson fakes, but even those don't survive any scrutiny. I'm sure that will change, and people will find new ways to signal authenticity in videos (leaving in fuckups is already in style).