read real time video from two seperate cameras connected to two computers

I connected one camera to each of the two computers.
I tried to used jit.qt.grab to read both real time videos from each camera and project to two different projectors.
The question is: How can I read both real time videos and display it in one computer? (assuming using jit.glue or videoplane).
If the video is not real time but a recording, I understand how to do this.(simply send a message to "read")
But jit.qt.grab is not saving the real time video anywhere in the computer hard drive. Is there another object I can use, or it there a way to read the real time videos from the cache in the computer? Any suggestions?
Attached an image of what I am trying to do if there is any confusion.