You should watch summoning salt on youtube
https://youtube.com/@SummoningSalt?si=0UyA0EGNTrEKSNA3
He makes slighly longer form veraions of this sort of video and as someone who has never done a speed run or wpuld have any hope of completing one i find it fascinating.
Plus the background music is so good on his videos.
What I wouldn't give to have even a tenth of the free time it would take to figure out which fucking frame you have to do this or that. I don't follow or know anything about speed running or whatever but I just watched this whole video, and this is serious skill. How the hell are people figuring these things out?