High Quality Content by WIKIPEDIA articles! Crash Course is an educational YouTube channel started by Hank Green and John Green also known as the Vlogbrothers. Crash Course was one of the 100 initial channels of YouTube`s $100 million dollar original channel initiative. Having finished their first courses on Biology and World History, Hank Green now teaches Ecology and John Green teaches English Literature. Crash Course launched a preview on December 2, 2011. As of 14 December 2012 (2012-12-14), the CrashCourse YouTube channel has gained over 400k subscribers and ~19 million video views, mostly coming from the World History segments.