The phrase describes applications or online services designed to extract audio from video content hosted on the YouTube platform without any financial cost to the user. These tools allow individuals to obtain audio tracks, often in formats like MP3, from YouTube videos for offline listening or other personal uses. An example would be an individual utilizing such a service to isolate the musical soundtrack from a documentary for personal enjoyment.
Such applications and services address the need for users to access audio content independent of video streaming. This enables portability, offline access in areas with limited internet connectivity, and the potential for audio editing or remixing (subject to copyright restrictions). Historically, the rise in popularity of these tools has mirrored the growth of online video platforms and the increasing desire to consume content in diverse formats and contexts. This availability of extracted audio can be beneficial to individuals for educational purposes, for creating personal playlists, or for sampling in musical compositions, again, contingent upon adherence to copyright law.