Does this sign warn of the possibility of ice on the roadway?

In the video you are driving through a town in winter; on the right there is a yellow triangular sign with a snowflake symbol - A-32 "frost on the roadway". This sign warns that there may be black ice on the roadway. The answer is: yes.

The Regulation on road signs and signals states that sign A-32 "frost on the roadway" warns of frost or black ice that may occur on the road; it is usually placed on bridges, flyovers, in shaded sections and near bodies of water, where the surface freezes faster than elsewhere. Black ice is particularly treacherous, because a thin layer of ice looks like wet asphalt, and grip falls almost to zero. The Road Traffic Act requires you to drive at a speed that keeps the vehicle under control, taking into account the weather conditions and the state of the road. Beyond the sign you slow down in good time, drive smoothly without sharp braking and turning, increase your following distance from the vehicle in front and do not overtake. A similar sign, A-15 "slippery road" with the symbol of a skidding car, warns of slipperiness for other reasons, for example a wet surface; A-32 with a snowflake is specifically about ice and frost.

Legal basis: § 12 para. 2 of the Regulation on road signs and signals; Art. 19 para. 1 of the Road Traffic Act (Prawo o ruchu drogowym)