The Duke of Sussex has thanked bereaved families mounting a legal challenge against two of the world's biggest tech companies for "telling your stories over and over again".
Prince Harry made the remarks in an at-times emotional address to parents gathered after the start of a landmark trial in California that will examine whether Instagram and YouTube damage young people's mental health.
The families are alleging that the online platforms are addictive by design. Lawyers for YouTube and Meta, which owns Instagram, reject the allegations.
Prince Harry expressed hope for "truth, justice and accountability" in footage shared exclusively with BBC Breakfast.
His remarks come after the prince launched a campaign for stronger protections for children from the dangers of social media last year.
