Are you sure its not a squirrel’s drey?

With that selection, I’m surprised there’s no tits as they fill an obvious niche. The will need a bit of greenery though (just a private garden should do). Have you tried getting a bird feeder? Otherwise find a city park.

Nothing more that I could see - this was somewhat distant, but the male flew up, both pecked for a short while, then the female flew off. They were clearly aware of each other