Looking for a video player with capability to maintain a long list of Recent Items
It Appears that Quicktime and VLC will have a default of ten (10) items in their 'Open recent' menu.

This can be over ridden by going to the 'General' system preferences and changing the 'Recent items'  to either:


none
5
10
15
20
30
50




You could also just add your videos Media Library in VLC and remove an item once you have watched it.