Mum Annemarie Theron set up a hidden camera after she noticed bruises on her nine-month-old daughter Wapbaze's neck, shoulders and under her feet.
Footage captured at her home in Namibia appears to show the family's nanny manhandling the tot, tossing her into her cot like a rag doll.
Devastated mum Annemarie told Netwerk24 : "It was very emotional watching it. I refused to sleep, eat or drink for a couple of days afterward.
"It’s difficult to imagine how long this has been going on for. I can see Wapbaze is so, so broken after everything."
Annemarie, reservations and marketing manager at a lodge in Namibia, and her husband Johan informed police and the nanny was arrested on Friday.
She appeared in court on Monday to face charges of child abuse, assault and attempted murder.
She was denied bail and remanded in custody until October.
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