The phrase identifies a category of online services that facilitate the extraction of audio content, specifically in the MP3 format, from video hosted on a popular video-sharing platform. These services allow users to obtain an audio file, typically for offline listening, from a video source. For example, a user might utilize such a service to extract the audio track from a music video or a lecture posted online.
The significance of these services lies in their convenience and accessibility. They provide a means to isolate and preserve audio content from video, enabling users to enjoy it independently of a constant internet connection or the visual component. Historically, the demand for such tools arose from the desire to listen to music, podcasts, and other audio content from video platforms on portable devices, predating the widespread availability of streaming services and robust mobile data plans. This filled a gap in accessing and consuming readily available online content.