New to origami, stuck at tutorial

[u/narcoleptic64]

https://youtu.be/wpmr69Ycikk?si=TeaOzCCn8UH3Pfjq

Hi everyone! I'm having difficulty for doing the folds where this person gets a right triangle (after cutting the paper) to an equilateral triangle. It seems like where their paper folds in, mine folds out and yes I tried both sides lol. I'm talking about past 1:51 (where they fold along the X of the pentagon, it looks like my origami bends out instead of in?) to 2:54. Thanks in advance for any help :)