Creating a comprehensive social media management feature that allows users to manage posts, videos, ads, and view statistics across all channels requires a well-thought-out plan and integration with various social media APIs. Here's a high-level overview of how you could approach building this feature into Ai.Doo.World using PHP:

### 1. **Architecture and Planning**
- **Requirement Analysis**: Identify the specific features you want to include, such as posting, scheduling, analytics, and ad management.
- **Social Media Platforms**: Decide which platforms (e.g., Facebook, Twitter, Instagram, LinkedIn) you want to support.

### 2. **API Integration**
- **Access and Authentication**: Use OAuth 2.0 for authenticating users and accessing their social media accounts securely.
- **API Endpoints**: Familiarize yourself with the respective APIs for each platform (Facebook Graph API, Twitter API, Instagram Graph API, LinkedIn API).
  
### 3. **Back-End Development**
- **PHP Framework**: Consider using a PHP framework like Laravel or Symfony to streamline development.
- **Database Design**: Create a database schema to manage users, posts, campaigns, and analytics.
- **API Client Libraries**: Use or create PHP libraries to handle API calls to the different social media platforms.

### 4. **Front-End Development**
- **User Interface**: Develop a responsive web interface that allows users to create, edit, and schedule posts.
- **Dashboard**: Implement a dashboard that displays statistics and analytics in real-time using libraries like Chart.js or D3.js.

### 5. **Features Implementation**
- **Post Scheduling and Management**: Allow users to draft, schedule, and post content across multiple platforms.
- **Video Uploads**: Integrate with APIs that support video uploads, ensuring compliance with format and size requirements.
- **Ad Management**: Enable users to create and manage ads, integrating with each platform’s advertising API.
- **Analytics and Reporting**: Provide comprehensive analytics, including engagement metrics, reach, impressions, and ad performance.

### 6. **Testing and Deployment**
- **Testing**: Conduct thorough testing for functionality, security, and API rate limits.
- **Deployment**: Deploy the solution on your web server with appropriate configurations for handling API requests and managing data.

### 7. **Monitoring and Maintenance**
- **Monitoring**: Set up monitoring for API usage, performance, and application errors.
- **Updates**: Regularly update to comply with API changes and enhance features based on user feedback.

### 8. **Security Considerations**
- **Data Privacy**: Ensure the solution complies with data protection regulations (like GDPR).
- **Secure Storage**: Safely store user tokens and sensitive data.

Developing such a feature is complex and may require a team with expertise in front-end and back-end development, API integration, and UI/UX design. Consider collaborating with developers who have experience in social media management tools to refine and implement this solution.