Stephen Downes is one of the originators of the Massive Open Online Courses (MOOCs). You may read more about him here 
This video is also available on Stephen’s website, where he introduces the video as follows:
‘Presented at MOOCs4All. In this discussion I discuss the thinking behind our MOOCs, personal learning environments and connectivism and consider the question of how we know whether the method is working, how we know whether it is effective’.