MADRID — A contestant on a Spanish reality television show says she was sexually assaulted by another contestant while she was unconscious — an attack that was recorded. The show’s producers then forced her to watch and filmed her reaction.

Two years later, it has all burst into the open, with the recent leak of a video in which the woman, then 24, can be seen sobbing after the show’s staff made her watch images of her own assault.

The video of her pained reaction has spread widely on social media, prompting a national backlash against the show, “Gran Hermano” — the Spanish version of “Big Brother” — and against what campaigners against sex crimes and harassment say is a culture that still does not take the problems seriously enough.

The leaked video, shown in Spanish media and posted online, shows the woman watching the recording, then weeping, pacing and burying her face in her hands. She begs to go talk to “her friends out there,” but an offscreen member of the show’s staff tells her that she cannot see her friends and should not tell anyone what happened.