It is a very good explanation on why they are a good that should not only be defended but promoted, and shows that it is entirely in line with Christian apostolic tradition.
Louie Verrechio gave a very good talk on Our Lady of Guadalupe which, although I shall not call a must-watch, certainly is at the very least a should-watch. There is a movie about Our Lady of Guadalue, "The Blood and the Rose", which he cannot recommend highly enough. He thought he knew about the apparition, but after watching the movie he realised just how little he knew.