I can shoot in 4K with my 7 Plus and it looks really nice -- as long as the conditions under which I'm shooting video are good. Which is to say, as long as I have lots of natural light, it's great. I used it at a show one time when my regular videocam ran out of juice and the iPhone didn't hold up so well. It constantly wants to adjust to the lighting, but it just can't seem to handle it very well. That's been my experience. As always -- YMMV.