网易公开课:http://v.163.com/open/

新浪世界顶级名校视频:http://edu.sina.com.cn/video/open/index.shtml

搜狐名校公开课:http://tv.sohu.com/open/

腾讯视频-淘课:http://bb.news.qq.com/open.htm

TED talks:http://www.ted.com/talks