Dacešin revealed on his Instagram profile that he spent two months trying to get in touch with someone who would allow him to film a story about the dark side of living in Hong Kong.

"Inside them, there are no rooms as we know them. Everything that person owns and their entire life takes place in a space like this. In some of these, you can't stand up or stretch out, and to make the paradox even greater, all of this is happening in Hong Kong—one of the richest cities in the world," Dacešin said.

He noted that Hong Kong is the city with the most expensive square meter of living space on the entire planet. An average apartment in the city costs between 20 and 25 annual salaries. In London, that number is close to 10 years, in New York 8, and in Paris 12 years.

Dacešin then explained the reasons for such high costs. One of them is the limited space—of Hong Kong's total area, only seven percent is currently built up.

Property owners often rent out just a sleeping space, and one such advertisement he showed in the video involved a rent of 196 to 305 euros.

Another reason is Hong Kong's history, where ordinary people could not buy land for construction—only construction companies could, for 75 or 99 years.

In the video, Dacešin visited a building containing "cage homes," and for some of them, the rent amounts to 261 and 283 euros. In one of them lives a retiree who told Dacešin that his pension is 435 euros.

Most of these units share a common toilet, and the conditions inside are quite poor.

"There's no other way; that's the system in Hong Kong," a man from Hong Kong said.

They noted that landlords raise rental prices every year, and the government is not doing enough to address this issue.