You intend to drive straight ahead through the intersection. Are you required to give way to a vehicle approaching from the right at this intersection?

In the video you are driving on a country road and approaching a junction; on the right there is sign D-1 "priority road" with plate T-6a, on which a thick line turns right and a thin line goes straight on. When going straight on, you must give way to a vehicle approaching from the right. The answer is: yes.

The Regulation on road signs and signals states that plate T-6a, placed under sign D-1, shows the actual route of the priority road through the junction. The thick line turns right - this means that the priority road goes off to the right, and the section straight ahead, where you intend to drive, is already a minor road. The vehicle approaching from the right is driving on the priority road towards the junction, and you, going straight on, leave that road and cross its path - so you must give way to it. The Road Traffic Act also requires you to exercise particular caution when approaching a junction. It is worth remembering the rule: as long as you are driving along the thick line, you have right of way; when you leave it, even by going straight on, you give way to everyone driving along it. There is no sign A-7 for your direction here, because plate T-6a tells you everything.

Legal basis: § 43 para. 1 and 2 of the Regulation on road signs and signals; Art. 25 para. 1 of the Road Traffic Act (Prawo o ruchu drogowym)