0:00 The most well kept secret of harmony?
0:54 A little bit of theory
4:14 Example 1 (Beethoven)
5:57 Example 2 (Bach)
8:09 Example 3 (Waterloo)
9:36 Example 4 (Somebody to Love)
11:26 Example 5 (Bohemian Rhapsody)
12:18 Why is the 2M5 Not Used Anymore?

Here's a rant about what is possibly my favorite chord progression, which everyone seems to have forgotten about: the 12M5 (or IIIV) progression.