Gtk.ScrolledWindow не работает для Gtk.HBox?

self.scrolled = Gtk.ScrolledWindow()
        self.scrolled.set_policy(Gtk.PolicyType.NEVER, Gtk.PolicyType.AUTOMATIC)

        for _ in vids:
            attrs = helpers.search.get_video_attrs(_)
            
            self.label_p = Gtk.Label(attrs['title'])
            self.listhbox = Gtk.HBox()
            self.vbox.pack_start(self.listhbox, False, False, 5)
            self.button_p = Gtk.Button()
            self.play_image = Gtk.Image.new_from_icon_name(
                "gtk-media-play",
                Gtk.IconSize.MENU
            )
            self.button_p.set_image(self.play_image)
            self.button_p.connect("clicked", self.on_click_me_clicked, attrs['id'])
            self.listhbox.pack_start(self.button_p, False, True, 2)
            self.listhbox.pack_start(Gtk.HSeparator(), False, False, 2)
            self.listhbox.pack_start(self.label_p, False, True, 2)

        self.scrolled.add(self.listhbox)