If you touch the 'Search' button when editing metadata for a movie, a 'Search for Metadata' page will appear. Simply enter the name (or partial name) of the movie you want to search for and iHomeServer will search a variety of online metadata sources to accurate metadata and cover art:

 

 

Tap the search result you want to use and you will be returned to the metadata edit screen.  Note that your metadata will be committed to the file as soon as you select a search result, you do not need to press the "Update Track" button to save your changes.