Hi
Don't know if this helps, but in order to load photos, I had to rename all files to DSCF101 etc, and put them in the DCIM folder in another folder called 100NIKON, and the adapter saw the lot.
Just a thought as my fuji calls its video files DSCFXXX in numerical order with the photos.
Remember they might not play unless they are the right format eg H264/AVC....
Hope this gives you a few ideas to try
Andy