LOS ANGELES—On the second day of a landmark jury trial in Los Angeles Superior Court—the first to take on tech giants over claims their social media platforms are addicting kids and fueling a national mental health crisis—attorneys for YouTube questioned on Tuesday whether the video app is, in fact, social media.
At the center of the case is a 19-year-old California woman identified in court documents by the initials “K.G.M.” or “Kelsey G.M,” who is accusing the tech giants of engineering products that rewire young people’s brains and trap them in a cycle of addiction and mental illness.





