Cool - if it’s working in the editor that’s a good sign 
Have you “Cooked” the content and packed it with UnrealPak.exe? Yes I did that, I made zipped packages which could be downloaded and also had them embedding into BMP files that I attached to hidden PowerPoint slides in their presentations… I did have it working with packaged files using UnrealPak but in the end I just skipped that and unzipped the files directly to the harddrive - seemed a waste of cpu cycles to pack it twice…