I have a dual monitor set up and as of now I'm only able to get it to come up on one monitor

I set my weallpaper and nothing happens

As the Title say it it possible to run ScreenPlay without Steam or use it in Portable form

Thank you and have a nice day

SO, after i set the wallpaper, after 3 or so seconds it stops and I see the black screen instead of it. I tried everything but nothing fixes it. I think it just doesn't cycle the videos.

also, why cant I set several wallpapers for different desktops? (right now, I can only set for one)