Even if a lot of people just lap up whatever tiktok feeds them, it still matters that people who care can get actual evidence from the real world that eventually filters out to public consciousness. It will have indirect influence, yes, but it'll still be a lot better than being fully post-truth.

Presumably if the video is AI generated we can also AI detect if it's a legitimate video.

That won't work for the original source probably, but I would think AI sophisticated enough to tell if you're just recording a monitor would exist.