[jka]

Kurento looks pretty great. Here's a brief snippet from their 'Getting Started' guide which could be useful too:

"If your intended application consists of a complex setup with different kinds of sources and varied use cases, then Kurento is the best leverage you can use.

However, if you intend to solve a simpler use case, such as those of video conference applications, the OpenVidu project builds on top of Kurento to offer a simpler and easier to use solution that will save you time and development effort."

(edit: and here's a link to OpenVidu: https://openvidu.io/ )