In this situation, does the flashing yellow light allow you to drive beyond the traffic lights without stopping?

In the video you are driving along a wide city street where the lanes have lane direction arrows painted on them; you are approaching a junction, and the traffic lights at the right-hand edge of the roadway are showing a flashing amber signal. This signal allows you to drive beyond the traffic lights without stopping - it only requires particular caution. The answer is: yes.

The Regulation on road signs and signals states that a flashing amber signal shown by traffic lights warns of a danger or an obstruction to traffic and requires you to exercise particular caution; traffic lights working in this mode do not control traffic. You would have to stop at a red signal or at sign B-20 - a flashing amber light means instead that road signs apply at the junction, and if there are none, the right-hand rule applies. As you approach the junction, you slow down, look at which signs determine right of way, check that no pedestrians are crossing, and drive through, giving way to those who have right of way, but without a mandatory stop.

Legal basis: § 98 para. 6 of the Regulation on road signs and signals; Art. 25 para. 1 of the Road Traffic Act (Prawo o ruchu drogowym)