The UK's Open University has released a series of short and witty cartoons called Design in a Nutshell that serve up a bite-sized introduction to architecture. They cover an eclectic mix of Gothic Revivalism (with Goths naturally), Arts & Crafts, Bauhaus, Modernism, Postmodernism, and a chrome plated look at American Industrial Design.
Instead of spending the next 15 minutes watching cat videos, you can learn something cool about the buildings around you. Well, unless you're an architect. In that case, the cat videos might be a nice break from the drudgery of designing Supermax prisons.