You could use this to check blacklight bleeding. You could use this as a mirror. You could use this to trick your parents that the computer is off when it isn't so you can play minecraft/fortnite after midnight without having to enter the password (that u probably don't know) on your parents computer xDDDDDDDDD You could use this to check dead pixels. You could use this as a timer. You could use this to clean your screen without having to turn off the computer. You could use this video when you’re watching a relaxing video (for example rain and thunder sound videos, relaxing lo fi beats or binaural beats. You can use this to check your oled display. You could use this video to take a screenshot of for if you need a black screen for anything (phone background, video editing, instagram story etc.) You could use this video to play overnight (turn brightness down) while you're downloading something that takes a couple of hours without your computer going to sleep mode. There are many ways to use this video and I know that many of these things can be done in different ways but people watch this anyways.
If you use this video for different reason, be sure to let me know! Also, if you have any ideas for future videos. They're more than welcome!