here is a link to my very favourite and most useful application: Itunes Folder watch
This little beauty starts with my system and watches a number of folders for video and audio files. Once new ones are added to the directory, it instantly adds them to itunes.
For me, it means that when my video files are automatically encoded they are loaded into one of those folders and instantly appear in itunes and on my apple TV’s.
I could not manage without this little jem. At €7.50 its a steal