What you want is doable, but not supported out-of-the-box. As of writing this post, there doesn't seem to be a Cordova plugin that allows the streaming of video from the device camera. If you need this to work in Icenium, you will first need to implement a custom plugin.
You might find this live video chat plugin to be a useful starting point: https://github.com/opentok/PhoneGap-Plugin
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