In this situation, does the traffic light prohibit you to make a U-turn at this intersection?

In the video you are approaching a junction in a city where S-1 traffic lights show a green light in the form of a full circle; you intend to turn left or make a U-turn. The general green signal does not prohibit a U-turn - only sign B-23 or directional traffic lights S-3 with a left arrow prohibit it. The answer is: no.

The Regulation on road signs and signals provides that the green signal of S-1 traffic lights means permission to enter beyond the traffic lights, and an arrow on the roadway allowing a left turn from the far left lane also means permission to make a U-turn, unless sign B-23 prohibits it or traffic is controlled by S-3 traffic lights. The Road Traffic Act prohibits U-turns only in a tunnel, on a bridge, on a flyover, on a one-way road, on a motorway, on an expressway anywhere other than at a junction, and where it would endanger safety or obstruct traffic. When making a U-turn on green, you give way to vehicles from the opposite direction and to pedestrians, just as when turning left.

Legal basis: § 95 para. 1 point 1 and § 87 para. 2 of the Regulation on road signs and signals; Art. 22 para. 6 of the Road Traffic Act (Prawo o ruchu drogowym)