True Dual Monitor Video Overlay?

I have two monitors, and sometimes use the video overlay feature, where video is played on one screen, and is automatically showed Full Screen on the other. I love the little feature, and it’s perfect for video editing. Except there’s one problem. In After Effects, and other video editing software, the overlay doesn’t work, and it only works for some codecs and sometimes doesn’t even work.

Is there software out there that would perfect the video overlay to give a really good result?

Thanks.

GBP