Stereo input shouldn't be an issue. It's possible that your Android device just doesn't have the codec needed to play the audio from your camera. Our app doesn't do video playback. Download MX Player (free) from the Play Store and try opening the video with it. When you tap on the video it'll ask you which app to open it with. Choose MX Player. Also, which video player were you using to play video initially? Was it 3rd party or the built-in video player on your Android device?