WonderFox HD Video Converter Factory Pro is a multiple purposes program with a set of convenient and useful tools, which aims to offer users the collective methods of converting video formats, downloading online videos, editing videos, record screen, etc. With its built-in video downloader, you're able to download videos and audio from almost all video and audio hosting websites and convert downloaded files to 300+ digital formats and devices. The screen grabber feature is also useful for saving any video and audio on your screen. The steps below are on how to record YouTube audio and convert YouTube videos.