In this situation, are you approaching an intersection of roads where the priority is determined by road signs?

In the video, you are driving along a road outside a town, with trees on the left and fields on the right, towards a junction; on the right there is sign A-6c "junction with a minor road on the left". You are approaching a junction where right of way is set by road signs. The answer is: yes.

The Regulation on road signs and signals states that sign A-6c warns of a junction with a minor road on the left; on that road there is sign A-7 or B-20, which requires drivers to give way or to stop. So right of way at this junction comes from the signs, not from the general rule of the Road Traffic Act, under which at an uncontrolled junction of equal roads you give way to a vehicle coming from the right - such a junction is marked with sign A-5 or not marked at all. For you, this means that when going straight on, you have right of way over vehicles coming out from the left; the driver on the side road sees only their own A-7 sign, so both signs must match each other. Even though you have right of way, you exercise the particular caution that every warning sign requires, and you watch the entry on the left, because not every driver reads signs as carefully as you do.

Legal basis: § 5 para. 1, para. 2 point 3 and para. 5 and § 3 para. 1 of the Regulation on road signs and signals; Art. 25 para. 1 of the Road Traffic Act (Prawo o ruchu drogowym)