Well, once again I had trouble getting a YouTube video to play this Sunday (the church laptop seems to me morally opposed to projecting them), so here it is for those who would like to see what I had intended to show.
As I began to say, this is the best short summary of the season of Advent that I have come across. It was put together by Busted Halo, an online ministry of the Catholic order of Paulist Fathers. While a lot of their materials are clearly Catholic in focus, they do have a number of resources like this one that are useful for all kinds of Christians.