MuskRatt
Hi,
When you open SKYBOX, you should see the "Home" channel, and within it the "Gallery/Directory" tabs.
Initially your Gallery should be empty, but you can navigate through you file system via Directory like you would with a PC.
Once you have located your video folders. I suggest you pin them to your channels by clicking on the upper right small menu and choose "pin current folder". This folder will show up in your channels list, and its content will show up in your Gallery.
The Gallery collects videos all your pinned folders and hidden folders.
Hope this helps.
Let me know if you have any more questions.
Andy