There are a few things you need in order to play video in reverse on an iPhone. First, you’ll need a video camera. Second, you’ll need an app that can play videos in reverse. Finally, you’ll need some hardware. To start playing videos in reverse on an iPhone, first find the app that can play videos in reverse. Once you’ve found the app, open it and click on the “reverse” button. The app will then start playing the video in reverse. To stop the video from playing in reverse, click on the “stop” button.