I recently remembered looking for speedrun videos after I first beat the game blind in 45 minutes.

This community is actually the second speedrunning group of OTS. But they ran an earlier version where Yuri is clearly much more of a badass space trooper. I'd love to see them join up with us. :D

Some rooms are much more difficult, most are very similar at least in execution of expected pathing.

I'd love to see more of this version of the game. Yuri is rambo firing that gun.

If I'm not mistaken, wasn't there a glitch with the Sector Gates that allowed clipping out of bounds, removing the need to talk to a the first two Guard Aliens? (Sorry, I can't actually watch the video you shared right now.)

Yes, there was. You can see it at 5:29 in this video:

We've tried to replicate it but unforunately, it seems it has been fixed in this version of OTS.

Yeah, some people (not sure how many and who were they) runned the desura version (that launched in 2012 if I remember correctly) and, as for the clip, it's not present in the steam version.