In this situation, are you allowed to drive over the double solid line on the roadway?

In the video you are driving on a roadway across a bridge with barriers and a red strip along the edge; the centre of the roadway is marked by a double solid line P-4, and cars are coming from the opposite direction. You must not drive onto this line. The answer is: no.

The Regulation on road signs and signals states that marking P-4 "double solid line" separates lanes for opposite directions and means a ban on crossing this line and driving onto it. So the ban covers even touching the line slightly with a wheel - on a bridge, where the roadway is narrow and there is a barrier at the side, every drift out of your lane brings you closer to oncoming vehicles. The Road Traffic Act also prohibits U-turns and reversing on a bridge. You keep to the middle of your lane, look far ahead, and in a strong crosswind on the bridge you hold the steering wheel more firmly.

Legal basis: § 86 para. 5 of the Regulation on road signs and signals; Art. 22 para. 6 point 1 and Art. 23 para. 2 of the Road Traffic Act (Prawo o ruchu drogowym)