Before you can convert it, you need the original file on your local drive:
The .MOV format (QuickTime) is high quality but can be bulky. Converting it to .MP4 makes it easier to share on social media or play on older Windows machines. Open VLC and go to Media > Convert / Save . Click Add and select your IMG_6580.MOV file. Click Convert / Save . Download IMG 6580 MOV mp4
This often happens during conversion if the audio codec isn't supported. Try using the "H.264" preset in your converter. Before you can convert it, you need the