The question is whether you are more worried about false positives or false negatives. If you are only worried about false positives, then the humans only need

The question is whether you are more worried about false positives or false negatives. If you are only worried about false positives, then the humans only need to review the content flagged by the AI. This has 2 benefits: 1) the "starting number" would be much much lower than 400 hours of content per minute. 2) If a 10 minute video is obviously pirated, you don't need to watch the entire video to decide that.