Just a nitpick: Kurento still exists on its own, and provides a generalist framework of components to build a service that can handle media.
OpenVidu is one such service, it builds _upon_ Kurento, and itself can be used to make videoconference rooms very easily. Otherwise, Kurento is just a media server that handles media but doesn't have the concept of "rooms", "publishers", "consumers", escalability, reliability, etc. so you would have to develop all those things on your own.
OpenVidu is one such service, it builds _upon_ Kurento, and itself can be used to make videoconference rooms very easily. Otherwise, Kurento is just a media server that handles media but doesn't have the concept of "rooms", "publishers", "consumers", escalability, reliability, etc. so you would have to develop all those things on your own.