YouTube has announced that they will reduce recommendations of videos that promote misinformation and conspiracy theories such as the earth being flat or 9/11 never happening. This does not mean that this content will be removed from YouTube or banned from being uploaded in the future. YouTube feels that this create a balance between providing free speech on their platform, while not contributing to the spread of misinformation. The change will only affect recommendations of what videos to watch, not whether a video is available on YouTube, the company says.
Source: https://www.bleepingcomputer.com/news/google/youtube-to-stop-recommending-conspiracy-theory-videos/