This infographic by the University of Florida Online tracks the parallel evolution of major news and social media outlets.
According to YouTube, 800 million users use the search box and their subscriptions to better understand and get a perspective on what happened in the news.
More than a third (35%) of the videos depicted devastating or intensely graphic images.
Almost two-thirds of the most viewed videos on YouTube (64%) were posted by citizens; 36% were posted by organizations.
News organizations produced 51% of these most popular news videos while citizen-produced videos accounted for 39% of the most watched videos, most of which were live eyewitness news moments.