GitHub - xingped/theYouMp3: A TamperMonkey/GreaseMonkey script that adds a download button to a YouTube video to open TheYouMp3 for downloading an mp3 of the video.
THEYOUMP3 - BEST YOUTUBE CONVERTER on Behance
TheYouMp3 - Video Youtube To MP3 Online Converter
15 Convertidores de Youtube a MP3 y MP4 sin programas [Fácil y rápido]