How to make a dark theme in YouTube

Dark themes in various applications are the trend of 2020. Many people want to enable such a mode, but sometimes it is not so easy to find where to activate it. Therefore, many people ask the question "How to make a dark theme in YouTube?". Below we will tell you where and how to enable the dark theme.
Consider turning on a dark theme on your PC and smartphone:
    * PC. In order to enable the dark theme on your computer, we need to click on the image of our account in the upper-right corner. In the drop-down list, we find the "Theme", in which the current mode will stand (As on the device or Light). By clicking on it, a list appears in which you need to select "Dark".
    * Smartphone. On your smartphone, you need to click on the image (if you put a photo, then instead of it there will be the first letter of your nickname or name) of your account – this will take us to the "Account" page in which you need to find "Settings", and then go to "General". Going to the page, find "Design" and there select "Dark Theme".