Glitching games shouldn't count imo. Don't know why those spergs think otherwise
For comparison, here's the new speedrun record set a few days back of Super Mario Bros.:
This game is a lot less interesting to see a speedrun of in comparison precisely because there aren't many amazing glitches. He just runs through the warp zones really fast.
Here's cosmo doing another run a few years back where he goes in depth into explaining the history of Oot speedruns:
There's one part in which he mentions the rock glitch, he laughs and says that it would basically be impossible to pull off without tool assistance. But in the run above, he actually pulls it off.
i saw this the other day, apparently though some of the spots where he pauses while it may seem is slowing him down actually helps with timing. also timing the jumps and where to land and how close to an enemy you can get is all incredibly precise.