Premiere Elements 2019 Organizer Question

Hi.  I just started using this program.  I had a bunch of VHS home videos from when my child was small.  I converted them and loaded them all into the media of the organizer.  I trimmed down 2 of 34 videos using the editor.  I saved the modified versions of the two videos to my desktop, where I can send them to people.  I don't really want to save the original versions of the 2 that I am done with.  I can't figure out how to delete these two videos out of the media portion of the organizer.  I want to do some housekeeping.  I wouldn't think that you'd want to have hundreds and thousands of these things piling up.  I thought I could just click on that file and click on delete.  That doesn't work.  I can't get rid of it.  Please help me.