In this situation, are you on a road with the right of way?

In the video you are driving along a street in a city behind a yellow and red bus and approaching a junction; on the right there are signs D-1 "priority road" and B-21 "no left turn", and sign C-9 is on the traffic island. You are on a priority road. The answer is: yes.

The Regulation on road signs and signals states that sign D-1 "priority road" marks the beginning or continuation of a priority road; drivers on the intersecting roads see signs A-7 or B-20 and must give way to you. The yellow diamond is repeated before every junction along the whole length of the main road, and its end is marked by sign D-2. However, right of way does not free you from exercising particular caution when approaching a junction - the Road Traffic Act requires it regardless of the signs, because a driver on the minor road may not notice the sign. You also remember sign B-21: at this junction you must not turn left or make a U-turn, so you go straight on behind the bus or turn right, watching the entrances of the intersecting roads.

Legal basis: § 43 para. 1 and § 22 para. 1 of the Regulation on road signs and signals; Art. 25 para. 1 of the Road Traffic Act (Prawo o ruchu drogowym)