It gets a bit tiresome seeing a bunch of people saying that there's no screen tearing in any Xbox One games and that if you're seeing it, it's because of your TV or monitor. It has nothing to do with that.
So, here's a video recorded using the Xbox One's Game DVR: -
The video is recorded internally by the console, so the TV or monitor I'm using is completely irrelevant.
The tearing happens twice in the video, once when I get shot and the screen turns red and again after I die and I swing the camera around.
Here's some still images of the torn frames: -
Perhaps some of you guys won't be able to see the tears in those images though, as your TVs are so good they make them disappear. ;)