Google’s YouTube says it is taking several steps to ensure the veracity of news on its service by cracking down on misinformation and supporting news organizations.

The company said Monday it will make “authoritative” news sources more prominent, especially in the wake of breaking news events when misinformation can spread quickly.

At such times, YouTube will begin showing users short text previews of news stories in video search results, as well as warnings that the stories can change. The goal is to counter the fake videos that can proliferate immediately after shootings, natural disasters and other major happenings. For example, YouTube search results prominently showed videos purporting to “prove” that mass shootings like the one that killed at least 59 in Las Vegas were fake, acted out by “crisis actors.”