Comprehensive Information Sharing Website & App

I'm in the market for an experienced website and app developer who can quickly and cost-effectively create a robust information sharing platform for both web and iOS/Android.

Key Platform Requirements:
- The platform should support a variety of content types, with a particular focus on video, text articles, and infographics, designed to meet the needs of busy business operations from A-Z.
- Video should be a primary focus, with functionalities mirroring those of Zoom. This includes, but not limited to, adaptive streaming, video playlists, and in-video commenting features.
- The platform also needs to encompass email and text chat features for easy communication.
- A virtual library for efficient file storage and organization is also a necessity.

Ideal Skills & Experience:
- Extensive experience in app and website development, particularly in information sharing platforms.
- Familiar with video streaming technologies and chat applications for business use.
- Track record in developing highly-organized, efficient virtual libraries for file storage.
- Proven ability to deliver swiftly and cost-effectively. A portfolio with similar projects will be highly appreciated.