Hi,
I'm using Plasma 5.6.5  et Frameworks 5.23 with backports source package
Video of Dragonplayer is staying up the other windows and horizontal menus. That's hiding main function choices. 
When I would like to do ksnapshot of the screen, the video picture is not present
I can not change the video for put it in full screen mode
That's affect VLC too 


Reproducible: Always

Steps to Reproduce:
1.Open any video 
2.
3.


Expected Results:  
Put the video in full screen mode

Here my video card information 
@X555UF:~$ sudo lshw -enable pci -class display
[sudo] Mot de passe de users : 
  *-display               
       description: VGA compatible controller
       produit: Sky Lake Integrated Graphics
       fabriquant: Intel Corporation
       identifiant matériel: 2
       information bus: pci@0000:00:02.0
       version: 07
       bits: 64 bits
       horloge: 33MHz
       fonctionnalités: pciexpress msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915_bpo latency=0
       ressources: irq:128 mémoire:dd000000-ddffffff mémoire:b0000000-bfffffff portE/S:f000(taille=64)
  *-display NON-RÉCLAMÉ
       description: 3D controller
       produit: GM108M [GeForce 930M]
       fabriquant: NVIDIA Corporation
       identifiant matériel: 0
       information bus: pci@0000:01:00.0
       version: a2
       bits: 64 bits
       horloge: 33MHz
       fonctionnalités: pm msi pciexpress bus_master cap_list
       configuration: latency=0
       ressources: mémoire:de000000-deffffff mémoire:c0000000-cfffffff mémoire:d0000000-d1ffffff portE/S:e000(taille=128) mémoire:df000000-df07ffff
users@X555UF:~$ grep /drivers/ /var/log/Xorg.0.log
[    38.271] (II) Loading /usr/lib/xorg/modules/drivers/intel_drv.so
[    38.315] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so
[    38.315] (II) Loading /usr/lib/xorg/modules/drivers/fbdev_drv.so
[    38.315] (II) Loading /usr/lib/xorg/modules/drivers/vesa_drv.so