The world's biggest social media companies have been accused of creating "addiction machines" in a landmark trial which began in Los Angeles this week.

The plaintiff, a 20-year-old Californian woman, is suing Meta, the owner of Facebook and Instagram, as well as YouTube, claiming the platforms' design left her hooked; with her mental health negatively affected.

It's thought the case could open the door to more lawsuits, potentially from millions of social media users, in the future.

• Guest: Eric Goldman, Law Professor and Co-Director of the High Tech Law Institute at Santa Clara University
• Producer: Pip Cook and Eddy Diamond