Email or message a file that hasn't been fully "flattened" by the OS yet. How to Fix or Prevent It
: Before exporting, make a duplicate of the video or "Share" it to your Files app first. This often forces the system to assign a standard name. FullSizeRender mov
: Instead of uploading directly from within an app like Dropbox or Drive, use the Share Sheet from within the Apple Photos app to "Save to Drive." Email or message a file that hasn't been