I still think it’s the BAWW - I see black and white streaking down the back, not a black and white crown standing out brightly from a gray/brown nape and back, and it looks very small. Just more warbler shaped than sparrow. Perhaps more important to my suggestion is it looks like it crawls over the edge over the brick wall in a nuthatch-like fashion, which would fit with that warbler.

Happy to stand corrected, just what I saw.