Meanwhile, ImTOO Download YouTube Video is updated too. It is FREE software now to download and convert YouTube videos to MP3 audio. November 18th, 2013, ImTOO YouTube to MP3 Converter is mainly updated to V5. And they can downoad YouTube 3D videos now. They can better download HD videos, including 720p, 1080p and even 4k videos. ImTOO YouTube Video Converter and ImTOO Download YouTube video (both PC & Mac) are upgraded.