I'm not sure I understand what you're getting at, so all I can offer is perhaps a brief and obvious response... Those would be all the photos I shot that I chose not to edit/adjust... after inspection they serve no purpose.
Hadn't noticed that one. I tend to keep "long form" videos in iMovie rather than iPhoto anyway. If I have a video longer than 1 minute, I'll move it over to iMovie immediately, and remove it from iPhoto.