知道本方法适用的网站。 下载4K Video Downloader。 安装4K Video Downloader。 打开首选网站。 找到需要使用的视频。 复制视频的地址。 单击或双击4K Video Downloader 图标，背景是绿色的，上面有一朵白云。 点击4K Video Downloader窗口左上角的粘贴链接。 单击下载视频下拉框。 点击下拉框里的 提取音频。 如有需要，可以选择质量。 如果您愿意，可以选择音频格式。 选择下载位置。 点击窗口底部的提取。

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
The app you'll use for this method allows you to download audio from videos that are hosted on any of the following websites:  YouTube Facebook SoundCloud Vimeo Flickr Dailymotion Although 4K Video Downloader's FAQ page mentions support for Metacafe videos as well, it is currently not possible to download audio from Metacafe with 4K Video Downloader. This app will allow you to download audio from videos on the aforementioned sites, and is free for Windows and Mac computers. To download the setup