Download YouTube Video in Safari
http://googlesystem.blogspot.com/2008/04/download-youtube-videos-as-mp4-files.html
Firefox適用
只要將連結中bookmarklet拉到bookmark bar
之後只要在YouTube時按下這bookmarklet
Video Info下就會出現download as MP4
再right click->download linked file as就可以
把extension改成.mp4就成
