오일파스텔 / 베네치아 풍경 (물을 잘 그리는 법)

The video introduces the concept of a 'witness' system, explaining how the 'waste' of a product can be harnessed to create a comprehensive 'witness' ecosystem, encouraging viewers to engage with the content and highlighting the importance of the 'witness' system in the context of a 'waste' environment.