Warning! Many system related files are meant to be present at multiple locations. 
Do NOT delete them, unless you are ABSOLUTELY SURE that you know what you're doing.
I recommend using this tool to scan your photo/video library, not system folders. 
The screenshots above are taken for demonstrative purpose only!  

An inefficient (slow) but fully functional tool for finding duplicates files on your disk.

Download an executable for Windows 7 or above only

Double click on each entry to bring up a popup window where you can select files to delete.