A look at Def Con’s White House-backed Generative Red Team Challenge, where contestants try to make AI chatbots go rogue; the results will be sealed for months (Will Oremus/Washington Post)

YouTube will stop showing users recommended videos in some places, including the homepage, when watch history is turned off entirely  —  Recommended videos keep users engaged on YouTube, but starting today, YouTube will stop showing recommended videos in some places, such as the homepage, if your watch history is turned off entirely.