There will be an option when you pull up the tab for this particular course if you go to the course website and that will link you right to the course website.

当你们点击课程标签时,有个登陆这门课网站的选项,那个链接可以转到课程网页

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

You can just go to Apple's website and download the appropriate link.

你可以登录Apple网站,下载相应链接。

哈佛公开课 - 计算机科学课程节选