If you purchased a recent iPhone (6S and above), then you may be loving the new Live Photos feature. If you aren’t, then maybe you just haven’t become well acquainted with it.
The best way to describe a Live Photo is to compare it to an animated GIF. You take a photo of your subject, which should be moving, and the camera on the iPhone will actually capture a short movie. When you apply pressure to it using 3D Touch, it will spring to life.