Most of them are in various states of undress or compromising positions.
In many videos tagged as being from Singapore, the homes have layouts typical of a Housing Board flat.
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A police spokesman said the public should make a police report if they are aware of anyone engaging in such activities.
The videos, which can last from under a minute to more than 20 minutes, feature couples, breastfeeding mothers and even children.
The victims appear to be from various countries, including Thailand, South Korea and Canada.