Black screen

I installed aerial.exe and .scr file on my windows 10 pc, downloaded all videos to run them offline, copied videos into aerial cache folder, refreshed cache in the app, it shows 35+gb for the videos size which is correct but when i Preview or Run the screensaver i am seeing only black blank display, non of the videos playing. How can I fix this issue?

Also aerial app is acting too heavy on my 3rd gen i5 pc with 32gb ram.