Trouble in Threes

[Husse]

It's not quite easy to read your post, pls sort things out a bit before you post. I can tell you that to make all hidden directories visible in Nautilus you just tick the right box in the menu, but there is probably a reason they are invisible
As for your other problems you need to be more specific.
Is the entire paper black - or just that portion of it that corresponds to the print screen section - and what does it look like on the screen?
As for your video question I don't get it - you write "but the player does" Huh?