It wasn't obvious on the Sony S550 BD player how to do an A-B loop, but on my "ancient and archaic" Toshiba HD-A2 HD-DVD player, I press the "Repeat button" and get about 6 options, including "Repeat Title"... Works like a charm. I am thinking of either Toy Story 1 or 2 since they also fill my 16:9 screen. :-)

Farewell - June 4, 2020