Theory questions

At an uncontrolled pedestrian crossing, you are not permitted to overtake:

“Vehicles or trams may not be overtaken immediately before or on an uncontrolled pedestrian crossing.” (Road Traffic Ordinance)

The pedestrian crossing in the video, however, is controlled:

“A pedestrian crossing is controlled if the traffic is regulated by traffic signals.” (Ordinance on Road Traffic Definitions)

In other words, overtaking the bus here is not prohibited.

Even though an action is not prohibited, it may still be inappropriate. Pedestrians could cross against a red light, and if you deem visibility to be poor, the safest option is to wait to perform the overtaking until after the pedestrian crossing.

(In this example, however, you appear to be receiving help from the bus. When you reach the pedestrian crossing, the bus will be blocking any pedestrians from stepping onto the crossing from the right-hand side.)