Task: extract audio from video
Assumptions:
Extract audio from video on iphone.
Steps:
Download the media converter app on your iphone.
Open the app.
Click on the plus icon.
Choose photos library.
Give the app permission to access your phone's storage.
Select the video from which you want to extract the audio.
Select your video from the list.
Choose extract audio.
Select the resulting file format from the dropdown menu.
Click on start conversion.