Epic Rap Battles of History, created by Peter Shukoff and Lloyd Ahlquist, stands as one of the most well-researched comedy YouTube channels around, pitting philosophers, scientists, politicians, and characters of literature against each other in breathless, data-dense, and surprisingly informative lyrical jousting matches (most available for download). In terms of sheer knowledge-spreading power, Epic Rap Battles is at the top of their game, with celebrity guests like “Weird Al" Yankovic playing Sir Isaac Newton. Their most popular videos of 2015 regularly racked up between 50 to 100 million views each, rivaling the videos of most pop stars.