The clips show the woman heading upstairs shortly before her death, and later, her husband trying CPR as two men carry her downstairs.
A woman who appears to be her mother-in-law, a retired judge, appears briefly on camera.
The victim's family says she lost 15kg due to constant abuse and has called out problems with the autopsy.
The husband is currently missing; police have announced a reward for help finding him, while the SIT continues to probe both family allegations and procedural lapses.