Yes, it's recording the current state as you activate the option. Then you can move the camera as you need, no sliding!
Sanity check please. The version of this that's in 2018.1 isn't the finished implementation, right?
I've just upgraded and tried this out, and it doesn't really work as it should. The image skews, crops, changes alignment. With some aspect ratios it doesn't seem to work at all. Even in your demo video, the image changes shape as soon as you change to render view.
Is it a work in progress?