YouTube flipped its videos upside-down. The effect displayed for visitors who opened the home page and then went to a video from there. It was also possible to activate the effect by adding the code &flip=1 to the end of a youtube URL. YouTube wrote that it had introduced the new format because, "Our internal tests have shown that modern computer monitors give a higher quality picture when flipped upside down—kind of like how it's best to rotate your mattress every six months." To see the new format, it advised viewers to either 1) Turn your monitor upside-down; 2) Tilt your head to the side; or 3) Move to Australia.