the only two versions you should be considering are whatever the latest update is (because it's convenient to be up to date) or 1.1.5 (it is the only version of the game where you have weapon and health carrying as a feature and the expanded costume inventory, plus if you're willing to go for a frame perfect trick 30 minutes into the run you can also do elevator escape allowing you to skip 8-4-2;3 fight). if you play on old versions you have to keep your internet off though otherwise you'll get sent back to the main menu and a popup that you can't get rid of will stop you from playing unless you update, as a result if you want to use statues in a run on an old version you are required to have premium on that save file
I really like what you tried in 8-2-2 sa3 and tested it out myself - it's only possible if you do a perfectly timed high kick cancel and the timing is very strict (took 5 times to get it) so yeah it is doable but I think in future in the off chance you get a carlgustav from the statue you probably shouldn't try since it's very punishing to miss with very little reward if you do get it
I have seen this a lot before and while I'm not 100% sure on how it works, my working theory is the following: elevators have ground and a moving platform at exactly the same height so if you frame perfectly land or punch or whatever at the edge of the elevator shaft you will be on the ground rather than the vertical moving platform, so the elevator would just leave without you. this is definitely a different glitch to elevator escape though so I can with absolute certainty tell you that this will not allow you to skip 8-4-2;3 fight, sorry
holy shit your 8-2-1 movement is so crazy. if it wasn't for the enemy in ;2 fight you surely would've gotten 1:26. honestly the only big mistake I can see in this run at the moment is the fact that you down kicked right before the pre-boss cutscene, you enter the cutscene box faster if you just keep holding right without down kicking
it's easiest for me if you upload onto those because the tool I use to time the runs properly only works on youtube at the moment (google drive is about the same). you can upload things to different websites but it is a lot more effort for me since I have to download it and then look at it in a video editor on my computer. tl;dr it's because I am very selfish