Media Player - Why do some folders have a camera or film icon?

As I am browsing my shows, I notice that the folder icon to the left of each show title sometimes has an image of a camera and sometimes film.  Many of the folder icons have no image embedded in them.

 

What does this mean?

These are folders that contain videos (film icon) or pictures (camera icon). These folders can be ‘played as a playlist’ or ‘played as a slideshow’ by holding the center (select) button and choosing the appropriate option.