Audio Separation

If a video has audio, you can separate audio from the video to remove the audio or edit the audio separately.

If a video file on the track has sound waveform in it, it indicates that this is a video with audio.

Select a video with audio on the track, right click on video and select "Audio Separation".

As can be seen, the video and its audio have been separated and are displayed on two tracks, which can be edited respectively.