Zuckerberg 'combative' during initial testimony at social media addiction trial

NBC News' Brian Cheung and Danny Cevallos review testimony so far from Meta CEO Mark Zuckerberg in a landmark case centered around whether social media platforms knowingly designed their apps in a way that harms children. Meta and YouTube deny claims that their products are to blame for mental health issues.

NBC News' Brian Cheung and Danny Cevallos review testimony so far from Meta CEO Mark Zuckerberg in a landmark case centered around whether social media platforms knowingly designed their apps in a way that harms children. Meta and YouTube deny claims that their products are to blame for mental health issues.

NBC News' Brian Cheung and Danny Cevallos review testimony so far from Meta CEO Mark Zuckerberg in a landmark case centered around whether social media platforms knowingly designed their apps in a way that harms children. Meta and YouTube deny claims that their products are to blame for mental health issues.