I accidentally held my iPhone on its wrong side while capturing many videos and I needed to flip them to be able to watch them on Windows 7. On my iPhone, the videos appeared on the right side, but they were upside down on my computer. So I just used this app to open my videos and to export them immediately (didnt need to actually flip the videos since they were on the right side on my iPhone). Then I plugged my iPhone into my computer and there was a new folder with all the exported videos on it. The video quality was quite the same and the size too, but hopefully the videos were now upside up! ;-)
Alexandreduf about Video Rotate And Flip, v1.3