Do Vuforia support streaming two camera at the same time

Hello there,

I am working on a project which needs to render a virtual object on the marker and see it through different directions using two web camera. So I am wondering whether Vuforia support streaming two AR live video from two different web cameras simultaneously in Unity? I tried to add one more AR camera in the unity scene but seems that only one is working when I test it in the unity.

Thanks,