Can you try to improve the question a little so whoever wants to answer does not need to watch the entire video, like adding some screenshots and making clear what your enemy scene composes of, in terms of who is a children or parent, for example:
and so on.
And in general terms, when you move the parent nodes all children nodes are moved/rotated by the same amount, because their position is in relation to their parent. So if your
KinematicBody2D is the parent of all other nodes, all the others should accompany it automatically.