Online video lectures

Ever found hard to read some online slides given in different tutorials or conferences, and missed the talk because of busy schedule or expensive conference fees? Today i came across a site that might change things a little. Videolectures feature lecture talks on many computer science related topics, with video and slides together (maybe not all). I find this extremely useful, because most of the time the talks' slides contain only the important points, and reading them does not really tell you much.

I personally will start listening to some lectures starting from tomorrow - got many things to learn and i find some of the lectures pretty good and informative. Of course they are not everything i need, but i do think it is a good start. 

do share how you find the site, and if you know other knowledge sharing portals that offer similar services. have fun!