itunes 12 renaming song database

I have a Nas with my iTunes library, /Volumes/music is my itunes mediafolder. I created one playlist and today I have something strange for some songs

+------------+-----------------+------------------+ 
|name        | artist          |album             | 
+-------------------------------------------------+ 
|a movie name|                 |an album name     | 
|from Video* |                 |from music        | 
+------------+-----------------+------------------+ 

• video is a volume on my nas… how to fix this ?