It's hard to say if you might be doing something to lessen your chances or not since I can't see your gameplay. What I can say is that there have been multiple hour stretches of time where I've not gotten the glitch once. You have to be persistent with it, but if you keep trying you'll surely get it enough to be worth the time spent.
+james roach All of these 2.5 videos are going to be added to KH13.com video archives, which contain all the playthroughs along with the cutscenes. Playing the game separately by characters is the standard way for playing Birth by Sleep, so I'll be recording that way.