It's a deepfake for Zuckerberg saying unsavory things about Facebook's control over data. Facebook has a policy that these types of videos will not be removed and this is a test of that policy. Facebook has de-prioritized the video since, but has not removed it, although they might as well have by de-prioritizing it. There was a deepfake of Nancy Pelosi previously that wasn't removed, but I'm unsure if it was de-prioritized too.
