The phrase identifies the process of extracting the sound component from a video hosted on the YouTube platform. It involves separating the audio track from the video file and saving it as an independent audio file, typically in formats such as MP3 or WAV. For example, a user might wish to save the music soundtrack from a movie trailer available on the platform.
The ability to isolate sound offers several advantages. It allows for offline listening to content that would otherwise require internet access. It can be utilized for creating custom ringtones, sampling sounds for music production, or preserving audio content from videos that may be removed or altered. Historically, the rise of online video sharing created a need for tools to manage and repurpose the audio elements of these videos.