I watched this recent happylee tas vs somewes wr video, and I can see that he did 1-2 clip, perfect 8-1 and perfect 8-4, but is that enough for 2.25 seconds over the record or are there other frame rules in there he saved? Also why the tas didn't fpg 8-3?

edit, it's not a human theory tas, but his human theory tas is still 4:54:280 so it's close.

In 8-3 a 244 is the same speed as a 242 FPG and the "human theory TAS" that you are talking about really isn't a human theory but a TAS that doesn't use left+right so it follows RTA rules. In the no left+right TAS there are unreasonable time saves such as a faster 4-2 , a faster bullet-shot in 8-2 with fast accel and a bunch of time save in 8-4 doing unreasonable fast accelerations. The actual human theory is somewhere around 4:55.1 or 4:55.2 adding in the 8-1 framerule.

got it, thanks for explanation.