Imagine if YouTube only had videos of people looking for love. That would be the world we could live in! Before YouTube had 1.9 billion daily users, it started as a video-based dating service, complete with the truly excellent slogan: "Tune in, Hook Up."

The reason they didn't flop is because they were willing to listen and fundamentally change their business when their original idea didn't meet the needs of their market. They were smart observers and flexible enough to adapt.

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We thank the following patrons for their generous monthly contributions that help keep Crash Course free for everyone:

Eric Prestemon, Sam Buck, Mark Brouwer, Indika Siriwardena, Avi Yashchin, Timothy J Kwist, Brian Thomas Gossett, Haixiang N/A Liu, Jonathan Zbikowski, Siobhan Sabino, Zach Van Stanley, Jennifer Killen, Nathan Catchings, Brandon Westmoreland, Dorsey, Kenneth F Penttinen, Trevin Beattie, Erika & Alexa Saur, Justin Zingsheim, Jessica Wode, Tom Trval, Jason Saslow, Nathan Taylor, El Shalakany, SR Foxley, Yasenia Cruz, Eric Koslow, Caleb Weeks, Tim Curwick, David Noe, Shawn Arnold, Andrei Krishkevich, Rachel Bright, Jirat, Ian Dundore
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