Last year, some videos from LGBTQ+ YouTubers were marked as restricted. Usually videos are restricted for containing explicit content, but the marked videos didn’t contain explicit content. The restriction meant that minors could not view the videos, which are used by many as a source of information and consolation. Furthermore, restricted videos cannot run ads, and some creators rely significantly on ad revenue for income. Eventually, YouTube uncensored the videos, but only under extreme pressure.
Sources: http://www.newnownext.com/youtube-censorship-lgbt-monetize/05/2017/, https://techcrunch.com/2017/06/19/youtube-updates-its-policies-after-lgbtq-videos-were-blocked-in-restricted-mode/