WonderFox HD Video Converter Factory Pro is a multiple-functional program designed to download, convert, edit, and record videos. When it comes to downloading online videos, WonderFox HD Video Converter Factory Pro allows you to download videos from YouTube, Facebook, Vimeo, Dailymotion, BBC, and 300+ sites without any limit. And it helps you get the best control of the download process and promises quick download speed as well as high-quality downloads. Along with the format the original video use, WonderFox HD Video Converter Factory Pro can convert videos to numerous digital formats and devices. The following steps elaborate on how to convert long YouTube videos to MP4 easily.