A landmark trial is underway in California that examines the mental health effects of Instagram and YouTube. Lawyers for the plaintiff, referred to as K.G.M., will argue that she suffered from mental health issues as a result of social media addiction. Her team claims that the named social media companies deliberately built “addiction machines” that use the algorithm to keep young people hooked. K.G.M.’s lawyers also argue that Meta and YouTube failed to warn of the dangers to young users posed by the design of their platforms. Instagram and YouTube deny the allegations and argue that they can’t be held liable for users’ behaviour.

Lily Jamali, the BBC’s North America Technology correspondent, is in Los Angeles for the case. She explains the arguments on both sides, previews who we will hear from and discusses the potential implications.

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