It depends on your region. Sometimes, it could be available on cable TV channels that focus on true crime documentaries. You could also look on specialized documentary streaming services.
Try looking on Hulu or HBO Max. Sometimes, these platforms have a wide range of content, including such documentaries. But keep in mind that licensing and availability can change over time.
It could be available on dedicated documentary channels or websites. Sometimes, you can also find it on paid subscription services that focus on such content. Do some online research to see where it's accessible.
I think some paid streaming services that focus on true crime stories might offer it. But make sure to check the legality and age restrictions before attempting to watch it.
Josef Fritzl's full story is one of the most disturbing in modern history. He created a secret dungeon beneath his house where he locked away his daughter Elisabeth. For two decades and more, she was at his mercy. He controlled every aspect of her life in that underground prison. The discovery of what he had done sent shockwaves through society. It made people realize the extent of evil that can exist within a family environment. The legal process that followed his arrest was closely watched as justice was sought for Elisabeth and her surviving children.
Well, the Josef Fritzl story is about a man who committed heinous crimes. He locked his own daughter in a hidden cellar in their house for over two decades. He treated her horribly, abusing her in many ways including sexually. The discovery of this situation was a huge shock. It showed how one person can carry out such atrocious acts in secrecy for such a long time, and it also raised questions about how such a situation could go unnoticed for so long.