This does, however, significantly less intelligent than I had imagined. The loading of the photos takes despite 100 MBit Internet for a long time - I would say, some more than 10 seconds per image.
The caching will not work properly if you between photos back and alternates, the program aims to re-download.
The slideshow ignored the extremely slow downloads and jumping from one screen to the next Loading without displaying any images.
If you give the program time to vorzucachen images (limited caching works well), also works the slideshow. What is missing are beautiful transition effects. When Apple TV the slideshow is very handsome as a picture frame, ... shown by Ken Burns effect. In this program, the images are simply scaled down and displayed on the screen size. There are transition effects, but do not even come from the quality in the vicinity of the effects of the Apple TV.
All in all: For a program I wanted to have more, because I have my photos on OneDrive. The implementation, however, is strongly improved.
I'll keep it, but only for lack of alternatives.