Internet checkpoints or internet pitstops are a phenomenon that began in the early 2010s, primarily on the video sharing website YouTube. Users of the website used the comment section of uploaded videos to identify that moment in time. Comparisons of this phenomenon have been made to 'temporal landmarks', stepping stones between past, present and future. Videos with music, often in the style of vaporwave or lo-fi ambience would be auto-played to users, with their comments sections used for personal reflections, each comment starting with the phrase "checkpoint". This word being a reference to checkpoints in video games, where the game is automatically saved and respawns can occur.