hi @joshcsepegi - don’t know if this helps exactly, but you could get mostly the same effect using something like MMM-BackgroundSlideshow, as long as you pre-downloaded a set of poster images from the movieposter website and loaded them to your MagicMirror somewhere the module can see them.
I do something similar with this module and a curated set of desktop-wallpaper-style images, shuffled on a configurable delay.
It does mean you don’t get the newest additions to the website until you’ve downloaded and added them to your local copy, but you also don’t need to worry about the module needing to handle a loss of connectivity gracefully, the poster website going down, the api changing etc.