Thanks Retro808 - it occurs when I am adding metadata, images, and videos to imported files that were not correctly recognized or unrecognized at import. So I am editing one game at a time, fixing the title and Launchbox ID, and then downloading media. The Launchbox Games Database/Storefront part of the media lookup and download is almost instantaneous, but it then takes a long time for the EmuMovies lookup to occur ("Querying EmuMovies..."), often up to a minute per game. The download of the Emumovies files is a bit slow too, at least compared to the Launchbox Games Database.