In this situation, do you have the right of way over the vehicle approaching from the opposite direction?

In the video you are driving on a suburban road, and before a narrowing of the roadway there are signs A-12a "road narrowing - on both sides" and D-5 "priority over oncoming traffic on a narrow section" - a blue square with a white arrow pointing up and a red one pointing down. Sign D-5 gives you right of way over the vehicle coming from the opposite direction. The answer is: yes.

The Regulation on road signs and signals provides that sign D-5 "priority over oncoming traffic on a narrow section" means that road users go through the narrow section, driving or on foot, before drivers approaching from the opposite direction; on the other side of the narrowing there is then sign B-31, which prohibits entering the narrow section if this would force those coming from the opposite direction to stop. So you have right of way, but you exercise caution - if a car from the opposite direction has already entered the narrowing, you do not force your way through, but wait until it has left it.

Legal basis: § 46 and § 25 of the Regulation on road signs and signals; Art. 3 para. 1 of the Road Traffic Act (Prawo o ruchu drogowym)