Crash Course is launched as part of YouTube's original channel initiative. Hank and John Green decide to leverage their YouTube audience for educational content.

Hank and John, as well as a great team of writers, editors, and illustrators, continue producing Crash Course videos, covering a broad range of subjects, including world history, biology, chemistry, literature, government, and economics. Several additional courses are created, including philosophy.

Crash Course amasses millions of subscribers and views, becoming one of the most successful educational channels on YouTube and receiving funding from various organizations, further solidifying the channel's reputation and impact in online education.