You can see some people in the back with cameras as part of an experimental pilot program funded by the Hewlett Foundation and at some point they will decide what they will do with these lectures.
你们能看到后面的摄像人员,这是个由休利特基金会赞助的实验性试播项目,在某种程度上来说,是由他们决定,如何使用这些课堂录像
基础物理课程节选 : 耶鲁公开课