There are a few things you need in order to play a video in reverse on an iPhone. First, you’ll need a video player that can play videos in reverse. Second, you’ll need some basic tools for reversing the video. Finally, you’ll need to have an iPhone or another device with a camera. To begin reversing the video, open the player and select the video you want to reverse. Then, use one of the following methods to change the direction of the video: -Tap and hold on the screen until you see a blue line appear that will indicate where your finger is when it’s released. This line will change color as you drag your finger across it. When your finger is over the blue line, release it and continue dragging to change directions. -Drag one of the corners of the screen towards the bottom or top of the screen until you see a green line appear that will indicate where your finger is when it’s released. This line will change color as you drag your finger across it. When your finger is over the green line, release it and continue dragging to change directions. -If using an iPhone 4 or later model with 3D Touch technology, use two fingers to drag along both sides of either corner so that they intersect at one point on top of the screen before releasing them both at once (this will also change direction).