Axis of Awesome: Four Chords

I found the link to this video while reading about Journey's Don't Stop Believin' on Wikipedia after having heard it on Pandora on my Google Android phone while out walking. Which is a small snapshot of how I get a lot of my ideas. Don't Stop Believin' is a song with an unusual structure. Its chorus doesn't hit until almost the very end, sort of what they did with Michael Jackson's Thriller when they did the video version. But the song has a very distinctive, very familiar four chords. Watch the video, and you'll understand.