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Ok, after the 6% part I was disappointed but watching it until the end: 

belif is a Korean cosmetics brand that advertises itself as "the only truthful cosmetic brand that you can believe in." It specializes in skin products and apparently in sniffing out honest people.

With 190,000+ views, the video has gained some mixed responses from Korean netizens. Some believe in the experiment's results, such as this top comment: "Is our country possibly as honest as Japan and [thus] the most honest in the world? Even when there's a notebook, bag, or cell phone in the bathroom of a cafe, we leave it alone. It seems that this is a difficult thought for places like America and Europe…." 

And there are others who aren't as convinced, such as this other top comment: "Even if you show us that our nation has a bright image, it's definitely not the case, it's not, kekekeke."