[Alyy]

I have already done this, but I would like to have on the menu directly.
 It is to facilitate my father who does not understand all that.

I'm confused. If you have added your movies to the Kodi library and scraped them they should all be showing up under the main menu item "Movies".

If you go into Skin Settings and disable all the main menu items except Movies (and maybe Power and System) all your Dad will have to do is click on "Movies" to choose one to play.

What am I missing? 

 Hi, That's exactly it, it must do nothing more than, browse movies and click on them.

I do not want it to get stuck on the menu bar or power or anything else. It is very quickly lost with remote controls

I map the keys of the remote control to have access to the system and others.