OK, here's Filmoa Act 1 completed.
This time play it back with Snes9x 1.52. I managed to improve over my previous run by 17 frames, some of it thanks to Hotarubi and some of it from my own discoveries. Because of extra lag during transitions and the point up to where you can select Special Mode, this SMV is still 44 frames more than Hotarubi's SMV counting up to the beginning of Filmoa Act 2, but rest assured that the actual in-stage gameplay is faster. Dunnius, if you feel like investigating something apart from changing boss behavior, see if you can find a way to reduce lag during transitions, like when you go from one room to another or one stage to another. I experimented but didn't find anything.
EDIT: Strangely, some door transitions don't have extra lag in 1.52. The door transition in Filmoa Act 2 just after the miniboss is the same length (or almost the same length) as in 1.51