OpenTok is a Video Call API platform (js) using WebRTC. 

(https://tokbox.com/)

You can try for a month for free. 

(You need to put a valid API Key and API Secret in OpenTok_SDK site properties to work)

In this module I build a few functions and REST services for:

• Create Session (REST)
• Generate Token (Extension)
• Start Archive (for Manual Session's Archive Mode option) (REST)
• Stop Archive (for Manual Session's Archive Mode option) (REST)
• A REST service to receive as a Callback function from OpenTok, all recorded sessions info

You can build your own video call aplication with some components that it is included in an Example App:

• PublishersContainer: All incoming video streaming inside the same container (OpenTok default; The first is your own webcam)
• MyPublishContainer + OthersPublishContainer: Separated views for your own webcam and others
• ArchiveRecordController: Manual start and stop record sessions
• Chat: A simple realtime chat using Signaling from OpenTok.js library

More info about SDK and REST: https://tokbox.com/developer/