Using Reverse Movie FX is very easy. You just have to select the video you want to work with and the clip you want to reverse. Alternatively, you could record the video directly from the app interface.
Once you choose the clip you want to reverse, you just have to press a button and, in matter of seconds, you'll have reversed your video to brilliant result. You can also choose whether you want to reverse the audio.
Reverse Movie Fx is a great editing app that can give some really fun results. In the application's main menu, in fact, you can watch several video clips to see what can be done with it.
Requires Android 2.3.3 or higher