Posted by Danny TarlowI'm not sure how long this has been around, but I just came across Stanford's repository of classes posted on YouTube:
I count somewhere on the order of 25 courses, which isn't bad. The one that caught my eye is Machine Learning, taught by Andrew Ng. This course was my first introduction to machine learning -- during winter of second year of undergrad -- and one of the reasons I got into the field (even though I felt like I was in wayyy over my head during parts).
If you're looking for just an introduction to what machine learning is along with some cool example applications, watch the second half of the first lecture:
I'd love to see Daphne's course on graphical models up too. That was another incredibly influential course for me.