In this situation, are you obliged to adopt a cautious approach?

The video shows pedestrians on the pavement to the right, pushing each other and behaving unpredictably right at the edge of the roadway. According to Art. 4 of the Road Traffic Act, you have the right to trust other road users unless their behaviour indicates a possible violation of regulations. In this situation, the visible scuffle suggests a risk of a pedestrian suddenly entering or falling onto the roadway, which obliges you to apply the principle of limited trust.