YouTube allows organizations to create channels. This then then allows people to subscribe to channels (RSS) so when new things are posted you get notified. As more and more video content goes digital, and hardware devices are created to allow you to connect this content to your flat panels, a la Apple TV, understanding how channels work could be a useful tool!
One example is the Oregon State University channel. Here you can find everything from time lapse photography of Earth from the International Space Station to horses on treadmills.