The clip is listed with a reference to Thunderdome Buitenbeeld and the item Cursus mindfulness, a mindfulness course, which explains its particular humour. Thunderdome is known as a Dutch hardcore and gabber festival, a setting built around extremely loud music, so a mindfulness framing collides head on with pounding sound and crowds. Shared online as a standalone reaction sound, the Dutch phrase has outgrown that specific framing and is now dropped into any video where peace and quiet were promised but never actually arrived.
About this sound
Dutch voice clip saying het is hier niet stil, linked to Thunderdome's mindfulness course sketch, used for loud, chaotic moments that ruin any attempt at calm.
A short Dutch voice clip of someone stating the obvious: het is hier niet stil, meaning it is not quiet here. The line is delivered flatly, as if making a calm observation, while the whole joke is that the surroundings are anything but peaceful. That contrast between the understatement and the noise is what makes it land. It works as a dry caption for chaos, the audio equivalent of looking around a loud room, a party or a festival crowd and pointing out, with complete sincerity, that silence has clearly left the building.