There is a small number of cameras which broadcast the video publicly. For example, Moscow: [1] (Taganskaya square), [2] and Saint-Petersburg: [3] (Nevsky prospect and Gostiniy Dvor). Sadly the quality is not great and in reality those places look much better. For example, many of the small 2-floor buildings on Taganskaya square are over 100 years and have a nie classical architecture but one cannot see any fine details in the camera view.

[1] https://gidcam.ru/camera/moskva-panorama-centra-stolicy-s-ma...

[2] https://gidcam.ru/camera/moskva-volgogradskij-prospekt-i-plo...

[3] https://camguide.net/ru/europe/russia/saint-petersburg/nevsk...