I found that movies MUST be in the folder named Shared Videos which is the default folder created on the MBL when you first look into the drives folder structure. I originally had created a folder called Movies and dumped movies into there. This worked well using my WD media player but not with Twonky. During the twonky scan (settings/media/Twonky/status) I could see the twonky checking that folder and counting the number of movies it found but upon finishing the rebuild it showed NOTHING. After moving all 721 movies to the Shared Videos folder and clicking on rebuild in twonky all movies showed up.
Hope this helps.
