I call these boxes media boxes. A media box could have several things on it. There is an audio file above with the instructor saying something about what is shown on the page. If there is more than one page for the box, you can use the arrows at the top to go forward and backward. I have three for this box as examples.

The box might give links to outside resources which could include webpages and videos. The links at the bottom of the page are for videos specificly developed for this course. "Video Links" gives a list of the videos that are developed throughout the semester. "Video Popup" is a video usually created before class about the day's topic. "Class Video" is a summary video of what went on in class that day. A full video of the class will be available for two weeks through The Big Blue Button. (If I remember to turn on record - remind me!)