Welcome!
This is the webpage dedicated to a little tool called WDTVLiveMetadataLoader... or the "Western Digital TV Live (hub) Metadata Loader".
It is still quite an annoying shortcoming of this media player that you need to manually get metadata info for every movie you put on it. With this tool you can preload all metadata for the files that give a single hit while searching for metadata on http://www.themoviedb.org.
Mind: this tool isn't meant to be a perfect application... I hope I can ditch it in a month time with the next firmware update coming up... so don't expect anything fancy!