Linking Podlove WordPress plugin with iCloud Directory

Hi all, any help GREATLY appreciated…

Is it possible to link Podlove WordPress plugin with MP4 files stored in an iCloud Directory?
The video file does not load. I can see the following error returned:

Media file mime type does not match expected asset mime type. MVI_0715/MPEG-4 Video Expected: video/mp4, but found: text/html; charset=UTF-8 toggle details

I’m not certain but I don’t think you can use iCloud as a storage for public files.