Block inappropriate content

I want to build a website and mobile app, and I need an AI content moderation system that can automatically scan uploaded photos and videos and block inappropriate content.

I would like to know which AI content moderation tools or APIs are best for detecting and blocking content such as nudity, sexual content, violence, drugs, hate symbols, and other inappropriate material.

The system should be able to scan both images and videos before they are published and automatically block or flag content that violates my platform’s rules.