In this situation, can you continue driving on this lane if the two lanes on the right are free?

In the video you are driving in the middle lane of a three-lane motorway, before an interchange with a direction sign to "Pruszków"; a black car is overtaking you in the left lane, and lane direction arrows pointing right are painted on both lanes on your right - the right lane of the roadway and the far right deceleration lane. You are allowed to continue in the lane you are in if the two lanes on the right are free. The answer is: yes.

The Road Traffic Act requires a driver to drive as close as possible to the right edge of the roadway, but this means the lane from which you are allowed to go in your direction. The Regulation on road signs and signals states that the lane direction arrow P-8 means that from the lane on which it is placed you may only go in the direction shown by the arrow, and a double-width line P-1 indicates that the lane it marks is intended only for vehicles entering or leaving the road. Both lanes on the right have arrows pointing right - they are only for vehicles leaving towards "Pruszków". The lane closest to the right edge from which you may go straight on is your middle lane, and that is the lane you continue in, even though both lanes on the right are free. After passing the interchange, you return to the right lane.

Legal basis: Art. 16 para. 4 of the Road Traffic Act (Prawo o ruchu drogowym); § 87 para. 1 and § 86 para. 2 of the Regulation on road signs and signals