Unfortunately, it isn't Beresford Square - we would have spotted that immediately (we're local). The newsreel was taken from an upper storey of a building on the "High Pavement" - a pavement which is only slightly raised above the main square. There was no fence around the square and certainly no houses or shops of that style around the square.
By squinting, I can both agree and disagree about the level beyond the fence. It still seems to me a pretty sombre occasion and one that people have dressed for (most people are formally-attired and, despite the flat caps, not one of the ubiquitous white scarves that were almost part of the working class uniform of the time can be spotted). I am still convinced it was a gathering to pay respect - for either a much-respected local worthy or a tragedy.