Can you post a screenshot of what you are seeing on the Windows PC?
On Windows there are typically two way’s to view the files on the My Cloud when using Windows File Explorer. One is through the file manager side, the other is through the DLNA client side. On Windows 10 the icons in Windows File Explorer may look like this:
The My Cloud DLNA server will not show file’s that it doesn’t support which may lead to video, music and photos one see’s using the File Manager side of Windows File Explorer not showing up when viewing the DLNA client side of things.
The My Cloud User Manual details the supported file types of the DLNA media server.