This is a simple one line script to highlight duplicate files - By NAME
How to use the script
Very briefly - I am assuming you know how to run a PS Script - if you dont Google it.
Run this script from the root of say your movies directory via the powershell console window (not the Powershell ISE if using PS5) - script is recursive so will find all movies
It may take a few seconds or minutes to look through all directories - depending on the number of files and speed of the pc