TfL have just uploaded three videos to YouTube about being Oyster Smart. I’ve got to say they are quite succinct in explaining the basics and well worth a watch. Here they are:
Of course they don’t go into very much detail about things like pink validators or out of station interchanges, but then that is where you can come to this website for more information. At least they are finally trying to publicise some of the features of the system in a catchy memorable way.