Test stereoscopic rendering without oculus rift plugged in

Hi guys. I am new to Unity and I have a question about stereoscopic rendering. I know that the oculus rift is supported natively with Unity 5.1+, there is this "Virtual Reality Supported" checkbox in the player settings which will magically replace all my standard cameras with "oculus rift cams". This is pretty cool in general. But I figured it does not work if there is no oculus rift device plugged in, because it simply renders as usual when I tried using it. The problem is that most of the time, I do not have access to the oculus rift and I would really need a way to see if things work without it (as much as this would be possible). What I want to have is this "split screen view" like in this video: https://www.youtube.com/watch?v=E8odzmY7_uk

So I wonder if there is a way to have it without manually duplicating all my cameras and creating the split screen myself (since this would not show me anything expect that my manually build splitscreen works)? So using the Unity mechanics for the oculus rift rendering but showing it on my monitor?

Any hint is appreciated.