The system will surface information from Wikipedia or Britannica Encyclopedia to display factual information in bitesize chunks below videos on climate change.
YouTube already implemented the feature for videos on a slew of other contentious topics, including the MMR vaccination, the moon landing and UFOs.
However, this is the first time the platform has targeted climate change deniers.
The feature is the latest step from the Google-owned video platform in its battle to reduce the spread of misinformation and conspiracy theories on the service.
Users who upload their content to YouTube cannot stop the service displaying blurbs of factual information below their content.