Human review is pretense, it costs more to do anything else. A human is told to process these as fast as possible, so the issue can be resolved. With these incentives, it wouldn't be reasonable to actually watch the videos in question. That's not what the system is designed to reward.

The human is there to rubber stamp the AI decision as fast as possible, so that Twitter can tell you your case has been reviewed by a human and settled. The important metric is speed, because that directly translates into cost.