There are a few ways to extract audio from video on Android. The first way is to use the audio player in your phone. The second way is to use the video player in your computer. The third way is to use a third-party app. The fourth and final way is to use a software application called Audacity. Audacity is available for free on most Android devices. To start Audacity, open it up on your Android device and click on the File menu at the top of the screen. Then, select New Recording Session. In the Name field, enter AudioFile1 and click on OK. Now, open up Audacity and click on the Record button at the bottom of the screen. When Audacity starts recording, you will hear sound coming from your video file.