https://www.techdirt.com/articles/20210421/15251046654/content-moderation-case-study-vimeo-sued-encouraging-infringement-via-lipdubs-2009.shtml

Summary: Vimeo is a video hosting site that was originally founded in 2004 as an offshoot of CollegeHumor. IAC acquired the company early on and it tried to position itself as an alternative to YouTube that was more for creators. In the early years, one thing that was common on Vimeo was so-called “lipdubs.” These were music videos often made by groups of people lipsync’ing to popular songs.

Vimeo itself effectively launched this trend with its staff doing a lipdub of the Harvey Danger song “Flagpole Sitta.” At the end of the video, you hear one Vimeo employee say “ we just made a million dollars, people!” And, indeed the phenomenon helped establish Vimeo’s place in the market. Soon there were many other lipdubs all over Vimeo.