I've used several YouTube Downloader/mp3 converter tools, but this one is by far the best! It uses a 3rd party website which is really key for it's performance. It is really fast and can handle many downloads at once. It doesn't directly download the video file when making an mp3 conversion: so it's great for metered connections! There's a small fee for using the website payable up front, but it's so worth it in performance! So happy!