Okay.
It appears screensaver controls only work with videos - is that right?
Also, while it did initially work setting the screensaver to activate after 5 secs, it decided it didn't like it after a while, and it appears fine with it set back to the minute again. (I'm assuming the GUI not allowing me to go below a minute is something of a warning, here.)
So now my main question really is: has anyone used Skraper recently? It seems great, but try as I might I cannot get the video resizing to work.