I can't figure out what you are watching.

DIY ideas and masterpieces from electrical engineer Dimovi: the private display - it is a liquid crystal display that no one else can understand, but only you can read. The secret is simple, actually Dimovi removed the polarizing filter from the LCD screen. This is because... (omitting N words), so without the polarizing filter, you can only see a white expanse. At this point, if you make glasses with the removed polarizing filter, you can enjoy the Internet privately.

If interested, you can find detailed DIY tutorials on Instructables. Of course, you probably need to have an old display that you can bear to say goodbye to.