The channel has extra than 3 million subscribers, and its films have been watched over 860,000,000 instances. In January 2012, Hank and John developed the academic YouTube channel Crash Course, as section of the site's Original Channel Initiative. As portion of YouTube Kids, a independent Crash Course: Kids channel was introduced in March 2015, with Sabrina Cruz hosting a Science study course geared toward a more youthful audience.