On a folder, "Add to playlist"

Description

I would like to put all video/music from a folder and subfolder to a new playlist or an existing playlist. This feature already exists for 1 file only...

Expected behavior

On the menu vertical 3 points for a folder, Add a menu item "Add to playlist". And then propose the same screen like screenshot to add all files from folder and subfolder to the playlist...

Screenshot / video

App mode

Smartphone (Remi note 7)