Windows 10: "Borders" around videos when opening full screen

Every time I try to fullscreen a video for the first time a sort of border of nothing appears - the video just doesn't cover the entire screen and you can see whats behind. Is this a known issue, and does anyone know a fix? Here's a screenshot, you can see discord behind the netflix video.

:)

 

Black borders on screen

Hi Lyn,

It is true that the challenges that you’re having with the black borders on your computer screen might be related to the Display Settings of your monitor just like what DaveM121 was suggesting. To better assist you with your concern, we need you to answer
the following questions:

• Which type of display cable are you using? ( VGA, DVI, HDMI cable).
• Were you able to update your display adapter drivers?

Looking forward to your response.

 

Can't get Youtube to show videos in Chrome

Load this checklist video in Edge:
(I'm assuming you did at least a few of these steps, since you stated you tried other suggestions earlier)

Go through the list of suggestions here to try to repair YouTube for Chrome...

 

Windows 10 media player cannot change video border color.

Hi Charlie,

We appreciate you for being a part of Windows 10.

Sorry for the inconvenience caused to you.

As you have tried to set the video border colors in Windows media player, kindly follow the below steps and check if it helps.

Step 1:

This issue may occur if the Windows files are damaged/corrupted. Follow the below steps and check if it helps.

• 
  Press ‘Windows + X’ Keys on the keyboard.
  
• 
  Click on ‘Command Prompt (Admin)’ to bring up an elevated command prompt.
  
  Note: Click ‘Yes’ if it prompts for permission.
  
• 
  In the command prompt type in the following commands one by one and then press
  Enter.
  

DISM.exe /Online /Cleanup-image /Scanhealth

DISM.exe /online /cleanup-image /restorehealth

sfc /scannow

Note: If you are not able to repair some files after performing SFC scan, I suggest you to refer to the point 3 “Windows Resource Protection found corrupt files but was unable to fix some of them. Details are included in
the CBS.Log %WinDir%\Logs\CBS\CBS.log”. Under the section “Run the System File Checker tool (SFC.exe)”
to repair the corrupted files after performing SFC scan.

Use the System File Checker tool to repair missing or corrupted system files

Use the System File Checker tool to repair missing or corrupted system files - Microsoft Support

If the issue persist, follow the below method.

Method 2:

I suggest you to turn off the Windows Media Player features and turn it on. This will reinstall the media player features. You may try to ‘turn off' Windows Media Player by following the steps below:

• Click on Start.
• Select Control Panel.
• Select Programs and Features.
• Select Turn Windows features on or off.
• Expand Media Features.
• Uncheck Windows Media Player.
• Select Yes and click on OK
  button.
• Restart the computer, follow the steps from the 1 to 6 again and make sure that you have checked the box
  Windows media player in step 6.

Now the try to open the Windows media player and check if you are able to change the video border color.

Note: As you have tried to pick the colors from the available colors, I suggest you to check whether the issue persists when you try to add the custom color as the video border color.

I hope the above information helps. Kindly let us know if you need any further assistance with Windows. We are glad
to assist you.

Thank you.