https://techcrunch.com/2019/04/15/notre-dame-cathedral-fire-youtube-factcheck/

Some viewers following live coverage of the Notre-Dame Cathedral broadcast on YouTube were met with a strangely out of place info box offering facts about the September 11 attacks.

Buzzfeed first reported the appearance of the misplaced fact check box on at least three livestreams from major news outlets. Twitter users also took note of the information mismatch.