The right-hand traffic and the style of the concrete apartment blocks strongly suggest Eastern Europe. The overhead trolleybus wires are a common feature in many cities across the Balkans and Romania. The architecture and the specific look of the street furniture point towards a major city in Romania. I suspect this is Bucharest due to the density and typical residential building styles. I am moderately sure of this location.

then: forward

The Cyrillic script on the billboard and the overall urban landscape point towards Bulgaria rather than Romania. The specific architecture and the mountain range visible in the distance strongly suggest Sofia. The traffic light configuration and the style of the street signs are very characteristic of the Bulgarian capital. I am quite confident this is Sofia.

then: guess