Here is the link. Important thing to note is integration of those videos with Facebook, one can create time coded(?) notes while watching the videos and share it with friends on Facebook and other people (though it does not seem to work). But I think all these things are accomplished better by Critter. Because I might not have all my classmates on Facebook and I might not necessarily want to add them. That's where the Teaching and Learning Network (TLN) comes into the picture. Because with the TLN, you will have all your classmates automatically added to the course you are taking. Hence, I think moving forward, integration of Critter with TLN will make it a very powerful tool for learning.