Oh, I love this teacher! She teaches in Hawaii, and started creating these when she had cancer and started wearing different wigs and had time. She has a great lecture on TED as well.
Just one problem, but it's a major one. Most of the world is neglected. Maybe you could help? How about something on the silk road, on the grand canal, on being a Manchu and governing China, on whether or not Marco Polo visited China, or ? So many possibilities.
Check out the "historyteacher" videos on youtube. I have had great success with teaching about concepts or particular people (i.e. Henry VIII) because the songs stick in the students head! Unfortunately, most of the videos are for Eurocentric historical concepts.