Done in 90 segments.
You clearly used God mode as you can see at 6:04 and numerous times where you don’t take damage from landing.
But still good job Rama!
The godmode is legit. The damage is supposed to be enabled after a cutscene in the beginning but i skip the cutscene so I stay immortal.
iirc there’s something similar to this in HL2, I think you only take damage after the knockout cutscene or something. I know the done portal run makes use of it.
Well thanks for telling me Rama!
What is this double jumping? o.o
EP2 unpack exclusive.
If you do a standing ABH on flat ground in early versions of new engine, you can get two hops in a row(aka a double jump). Because of ABH this accelerates you very quickly. You’ll see more use of this in just a few days 
2 days to be more precise.