The University of California Berkeley has decided to make a plethora of lecture videos available via a custom YouTube channel. Currently there are some 200+ lectures available online, with more to be added as the semesters progress. As you can imagine the breadth of subject matter is enormous, and this marks one of those instances where an organization puts a public resource to (what I would consider) its ideal use.
Super cool. Below is a Physics 10 lecture on atoms and heat.