Unknown files display on Orbiter when selecting Videos - Just wondering

[Marper]

I have a clean install for Core / MD 0710RC2 -

When selecting the Media, Videos, I see a large number of files that appear to be system files like:  Doorbell.mpg, default.avi, and many others like it.  I'm sure these should be on the system, but was wondering if anyone knows how to remove them from the view on the system without deleting them  ?

Thanks