get and add item to a existing list container

Hello…
does someone know if there is any possibility with python api to add items to an existing container list ?

i explain :

my list container under xml skin point to moviedb://videos/ ……

and in my video addon, i would like to add items to this list…..

anyone already do that ?

trying with getControl and add , but nothing work Sad

So, i get items with JSON Api and add item with addDirectoryItem….

But it seem getting list item <content>moviedb://….</content> in xml skin is more fast than with with JSON Api

thanks