MetaData Not Coming from MP4 Tags

I had assumed that “embedded metadata” referred to the metadata present in the MP4 tags (for an MP4 video), but this does not seem to be the case. I have all the main metadata set in my MP4 files, including cover art, yet what is shown when displaying a list of movies from a (UPnP) network share does not match the tag, at least not the Image. Rather, it seems perhaps to be a random frame from the video (perhaps).

Please explain how metadata is retrieved / from where, for each of the two options the product supports, viz:

  • “Metadata Fetching”;
  • “Embedded Metadata”.