Crash Course is a YouTube channel founded in 2012 by John and Hank Green of the VlogBrothers. The videos generally cover topics related to humanities and science presented by the Green brothers and a host of others.
- As part of The Muppets at YouTube Space LA project, the Muppets appeared in a video about economics in July 2015. The video was originally described as "John and Hank Green from Crash Course encounter a classroom full of rowdy Muppets." The released video opened with reference to lack of the Green brothers, hosted instead by Adriene Hill and Jacob Clifford. They were joined by Statler and Waldorf, Kermit the Frog, Dr. Bunsen Honeydew, and Beaker.
- "Atomic Hook-Ups - Types of Chemical Bonds: Crash Course Chemistry #22" includes a reference to Ernie and Bert's relationship.
- "The Clinton Years, or the 1990s: Crash Course US History #45" Mr. Snuffleupagus appears in the Thought Bubble.
- ↑ "The Muppets and Top YouTube Stars Make Inspirational, Celebrational, Muppetational Videos at YouTube Space LA" Disney Interactive, May 4, 2015