YouTube下载工具FastestTube

For Opera 11, Safari 5, Google Chrome, Firefox and Internet Explorer!

Install the extension by clicking on the Install button
Open any YouTube video you want
Locate the Download button under the video player
Choose your prefered video format and quality. The download will begin.

支持Opera 11, Safari 5, Google Chrome, Firefox and Internet Explorer!

通过点击“安装”按钮安装扩展
打开你想要的任何YouTube视频
找到“下载”按钮下的视频播放器
选择你喜欢的视频格式和质量。下载将开始。

官网：http://kwizzu.com/