Show thumbnail of subfolder if there's only one?

[BK201]

For example steam screenshot folder (\Steam\userdata\{userid}\760\remote) looks like this:

Code: Select all

\remote
├─\345820
│   └\screenshots
│      ├20171202223241_1.jpg
│      ├20171202223241_2.jpg
│      ├ ...
│      └20171202223241_142.jpg
│ 
├─\345821
│   └\screenshots
│      ├20171202223744_1.jpg
│      ├20171202223744_2.jpg
│      ├ ...
│      └20171202223744_66.jpg
│ 
├\345822
│
...

I want to show thumbnail of screenshots like this

Is it possible? Or is it possible with 3rd party software?

*No, you can't change file structure of those images, Steam won't recognize it

[xnview]

I'll check if it's possible easily...