Thanks, but i am a little confused

With reading the first part of your answer, i understand i sould use it like this :
- All the boxes get the 'Collection' type
- All the titles, either inside a box or alone get the 'Movie' type
(my movies just handles 'DVD' titles and not TV shows with episodes)
(actualy i put 'Everything' type for the box to recognize them, as in my head it could conatin anything, i'll change that)
But i get confused with the 'root'. Because with what i understand, all the boxes and the alone titles will get 'root' type, while only the titles inside a box will get 'Movie' type.
This means we won't be able to distinguish a box from a title alone by looking at its type (unless you 'bit or' it with 'collection' type). I am mistaking something ?
Also, for me the 'root' is unneeded, because a root is just a title without a parent, so you can deduce this value automaticaly, no ?