I just finished a busy weekend of filmgoing at the Hamptons International Film Festival. This annual Hamptons ritual — which celebrated its 25th anniversary this year— has always struck me as a bit of a superfluous stop on the film-festival circuit.  It overlaps with the higher-profile New York Film Festival, just a hundred miles to the west, and most of its big films are second helpings from more prominent festivals in Toronto, Cannes and elsewhere. Still, the festival always brings in a lot of interesting little films looking for attention (especially foreign ones and documentaries), draws an enthusiastic crowd of non-cineastes to its packed screenings, and is increasingly regarded by the film studios as a good place to generate buzz for their big fall releases. Nearly all the major Oscar nominees from last year were previewed at the Hamptons festival — including Moonlight, Manchester by the Sea and La La…