Last I checked this wasn’t working in 4.12 without packaging, has something changed since this post? https://answers.unrealengine.com/questions/418234/412-p3-loading-screen-on-preloadmap-is-not-fixed.html
I couldn’t get it to work in editor, and I looked through the source and saw it was doing a check and loading a null movieplayer in the editor.
Although, that wasn’t a 4.12 code change so I was a bit confused. I gave up for the time being and stuck with my static loading screen.
But is there a way to get this to work in editor?