I would say this is an overall positive: The more people are aware of how easy it is to create fake this with AI the better, I would say. That would make people less likely to fall for it in the future, especially for something with greater consequences than just a parade that didn’t exist.
I heard SimpleX is a good privacy oriented chat program.
Found a video by Mental Outlaw explaining how to use it. https://www.youtube.com/watch?v=0cRu98XSap0