hide empty directory (no playable media)
for exemple, "myStuff/holliday 1" folder contain only photos, and "myStuff/holliday 2" folder contains video and photos.
when i browse videos on my tv, i would like to see "myStuff/holliday 2" but not "myStuff/holliday 1" (because there's no videos in this folder).
when i browse images on my tv, i would like to see "myStuff/holliday 1" and "myStuff/holliday 2" because they both contain photos.