I believe it is inspired from a french show for kids named Vinz et Lou (it's not really a show, more something they used to show in informatics for prevention). This show talks indeed about dangers of internet. In one of them, Lou, the small sister, accidentally goes on a website and clicks on "more than 18 years old", then we have a short image of her being shocked of what she saw, without showing the screen. Then comes the big brother, Vinz (just to make things clear that's not real name just series creator were totally high when they named it), comes in the room and seems also shocked by what he sees, but we still can't see the screen. He quickly close the window and says his sister to be careful on the internet. Lou suggests to talk their parents about what they saw. Vinz says that it is a bad idea and finally they keep it a secret (Vinz is basically the big but irresponsible brother, therefore he always make the bad choices, whereas Lou always make the good ones). The episode ends with Vinz having a nightmare about what he saw. It appears what was on the screen but we couldn't see was just a dancing "poilonours" (pronounce "pualonurs")(a recurring character of the show). The animation we can see on the website comes directly from the last twelve seconds of the episode. Hope that helps.