Everything is not intended to search for "duplicate files" (in the traditional sense), but it does a great job on finding files. So knowing file names, it can be extended to find duplicate names
Now if you sorted the list by size, you may find two of the same named file, with the same size.
And that tells you you have two same named, same sized files.
It does not prove they are "duplicates" in any other manner.
Now if you sorted the list by size, you may find two of the same named file, with roughly the same size.
Might have to view down the list of files a bit, but that may point out two versions (perhaps bitrates) of the same movie, perhaps. So a high bitrate & a lower bitrate. And with that you can say, hey, lets get rid of the lower bitrate version.
dupe: or "dupe: .mp4" ... with a quick analysis could point out things like that.
It might not always be quit obvious. But if you were looking to prune things, dups, sorted by size can give a very quick idea of items to explore further. Could even have a second window of Everything open, so with that biggest file now known, just jump to the other window, pasting the filename & go from there.
or Duplicate Cleaner Free
will be able to search for dups with a provided size range. (The most recent pay version of DC, 3.1, is not up to par IMO - at this time, & I prefer the older 3.0.1 Free.) AllDup is quite a handful when you first look at it, but you quickly become accustomed to it. In any case, both are full featured & very good.
There are lots of lessor programs out there, depending on your needs.
Nirsoft's utilities are always great. His SearchMyFiles
will also find duplicates & may be enough, depending on ones needs.