Open YouTube in Full Screen Mode and type the awesome. The progress bar in video player will start blinking/flashing and will show rainbow colors randomly which provides an awesome effect to the progress bar as shown in following image.

Open YouTube and search for Do the Harlem Shake in search box and the search results page will do the Harlem Shake. The song Harlem Shake will be automatically played on search results page which can be muted or paused by the user and videos will shake based on the beats.

Open YouTube and search for Doge Meme in search box. The search results page's fonts will be automatically converted to Comic Sans and will show text in various colors.

Open YouTube and search for Use the force, Luke in search box. The search results page will show the videos using Star Wars effect. You'll notice a wavy effect on search results page and everything will fly on the screen.

Open YouTube and search for Webdriver Torso in search box. The search results page will have red background and will show a blue rectangle around some videos. You'll also notice aqua.flv - Slide 0000 up to 0009 written at the bottom of the search results page.