yes kuchi, and using 30fps. you have to turn at exact moment between 2 frames so elma doesnt see it (so ofc higher fps make it much harder as they decrease interval between frames). right volt for extra head velocity, which increases your chance to avoid polygon border. after you go through you wont die cause its kinda like making a level with head inside ground. you dont die straight away, you die only when head tries to change its enviroment.
i had a talk with sunl, imo he could put a little interesting comment on the technique of it also if he wants
and the wheel squeezes are a bit moody sometimes, they sometimes misbehave xd
had a little talk with bene also but forgot what i wanted to say about it, except: he said high fps before the trick make you get closer to wall, wwhich is quiute obvious when you think about. ok, but its quite impossible to switch back to 30fps AND turn at the very same moment before the wall in real lev.
about 01:
the rec itself doesnt tell much, except that its necesary to be on mid-or-low fps for 3s part, 56s, 1:13 and HIGH for 1:00.
theres no optimal fps that can squeeze you through tightness on low speed but keep you hangin on high speed, so you need to use fps-lowering trick. its probably up to your imagination, there can be many techniques to achieve that. i simply used fraps recording for mid-low parts, turned it off in pipe before 1:00, then recording on at 1:11 again. max fps instantly turn into 150 (according to fraps, but settings claim 30) and instantly go back to max when turn recording off. lev is very easy to hoyl even once you know the trick, i just didnt bother
sunl could put a comment here also

would like to see a level when you have to use the trick multiple times xd. its easy to control, only 1 extra button once in a while