I think that I recognised the street in Amsterdam, because I lived for two years in that city and stil often visit and stay in Amsterdam for a few days at the time. It is the typical pre-war, early 20th century architecture that caught my eye. It's called the Amsterdam stile. The round from of the balconies in the left corner is a typical example of that style.
But you are right, it might have been Warsaw as wel, because next to the old town pre-war warsaw also had modern buildings and streets. Warsaw was a very advanced, cosmopolitan and thus international city back then. Like Amsterdam it had Jugendstil and 'Amsterdam style' like buildings, but then ofcourse the Polish version with Polish architects, constructors and etc. I have an interest in city history, how cities grow, and the various layers of architecture, infrastructure and industrial/ economical development (trade, commerce, innovative production and etc.)