How to Build an Amazing Secret Monitor Only You Can See?

Brusspup, the illusions wizard on YouTube, basically stripped the polarizing filter that comes standard on top of any monitor to make the content that appears on the screen invisible (or rather, unreadable). To make the screen readable, Brusspup then made special glasses with the same polarizing filter to decipher the blankness. That way, whatever’s on the screen is made for your eyes only. Way better than dark privacy screen filters!