clipped from: www.nytimes.com   

With the Insight information, video creators can dig into the specifics of a video’s performance and find, for example, that it peaks on Fridays in winter months, or it has taken several weeks to get traction — information that can help better promote their work. The information, presented as a color-coded map and a graph of a video’s popularity, is accessible through a link from a video creator’s account page on YouTube. The company will update the data once a day.