Read files from Multiple subfolders in Dual Vertical?

Yes simply replace the full path to the both folders you want to show. you can browse for the path yourself when editing the button (when you pasted it, right click it while youre in customize mode and click edit). Sorry, i cant edit the paths since they are absolute to your system
but it should be something like
Go C:\yourPATH\IMAGES DUALPATH C:\yourPATH\VIDEOS

have a look at the docs in general

I just made the thumbs for the left side work, not sure where i screwed up, but it shows you in general an idea of what to do.