WonderFox HD Video Converter Factory Pro is capable of downloading videos, playlists and channels from YouTube and other 300+ sites and converting videos to MP3, MP4, and any other formats you need. It ensures the fastest conversion speed and will never restrict video length. Just use it to convert YouTube 2 hours, 3 hours and more to MP3 without hassles. As a powerful YouTube video downloader, besides enabling you to download 720P videos as most online YouTube downloaders do, this program can also help you download 1080P, 4K and even 8K videos without a hiccup. You can even use it to download YouTube subtitles. Let’s have a look at how to easily convert YouTube to MP3 long videos with the software.